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  • Articles  (47)
  • Species Specificity
  • 2010-2014  (24)
  • 1980-1984  (23)
  • 1950-1954
  • 2010  (24)
  • 1981  (23)
  • Science. 211(4479): 291-4.  (1)
  • Science. 211(4480): 332-4.  (1)
  • Science. 211(4485): 949-51.  (1)
  • Science. 211(4488): 1303-11.  (1)
  • Science. 212(4490): 58-60.  (1)
  • Science. 212(4490): 85-7.  (1)
  • Science. 212(4493): 446-52.  (1)
  • Science. 212(4498): 1049-50.  (1)
  • Science. 212(4499): 1100-9.  (1)
  • Science. 212(4501): 1350-7.  (1)
  • Science. 212(4501): 1400-2.  (1)
  • Science. 212(4502): 1512-4.  (1)
  • Science. 213(4504): 172-8.  (1)
  • Science. 213(4504): 226-8.  (1)
  • Science. 213(4506): 459-61.  (1)
  • Science. 213(4507): 551-3.  (1)
  • Science. 213(4509): 759-61.  (1)
  • Science. 214(4516): 74-5.  (1)
  • Science. 214(4516): 87-9.  (1)
  • Science. 214(4517): 149-59.  (1)
  • 25
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  • Articles  (47)
Years
  • 2010-2014  (24)
  • 1980-1984  (23)
  • 1950-1954
Year
Journal
  • 1
    Publication Date: 2010-08-07
    Description: For RNA viruses, rapid viral evolution and the biological similarity of closely related host species have been proposed as key determinants of the occurrence and long-term outcome of cross-species transmission. Using a data set of hundreds of rabies viruses sampled from 23 North American bat species, we present a general framework to quantify per capita rates of cross-species transmission and reconstruct historical patterns of viral establishment in new host species using molecular sequence data. These estimates demonstrate diminishing frequencies of both cross-species transmission and host shifts with increasing phylogenetic distance between bat species. Evolutionary constraints on viral host range indicate that host species barriers may trump the intrinsic mutability of RNA viruses in determining the fate of emerging host-virus interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Streicker, Daniel G -- Turmelle, Amy S -- Vonhof, Maarten J -- Kuzmin, Ivan V -- McCracken, Gary F -- Rupprecht, Charles E -- 0430418/PHS HHS/ -- New York, N.Y. -- Science. 2010 Aug 6;329(5992):676-9. doi: 10.1126/science.1188836.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rabies Team, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. dstrike@uga.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20689015" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bayes Theorem ; Chiroptera/*classification/genetics/*virology ; Communicable Diseases, Emerging/transmission/*veterinary/virology ; Evolution, Molecular ; Genes, Viral ; Host-Pathogen Interactions ; Likelihood Functions ; Molecular Sequence Data ; Monte Carlo Method ; Nucleocapsid Proteins/genetics ; *Phylogeny ; Rabies/transmission/*veterinary/virology ; Rabies virus/classification/genetics/*pathogenicity/physiology ; Species Specificity
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-09-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sauvageau, Guy -- Humphries, R Keith -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1291-2. doi: 10.1126/science.1195173.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Genetics of Stem Cells Laboratory, Institute of Research in Immunology and Cancer, University of Montreal, Montreal, QC H3C 3J7, Canada. guy.sauvageau@umontreal.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20829472" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD34/analysis ; Cell Lineage ; Cell Proliferation ; Cells, Cultured ; Fetal Blood/cytology ; *Hematopoiesis ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/*cytology/*drug effects/physiology ; Humans ; Mice ; Purines/chemistry/metabolism/*pharmacology ; Receptors, Aryl Hydrocarbon/*antagonists & inhibitors/metabolism ; Small Molecule Libraries ; Species Specificity
    Print ISSN: 0036-8075
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  • 3
    Publication Date: 2010-03-20
    Description: Differences in gene expression may play a major role in speciation and phenotypic diversity. We examined genome-wide differences in transcription factor (TF) binding in several humans and a single chimpanzee by using chromatin immunoprecipitation followed by sequencing. The binding sites of RNA polymerase II (PolII) and a key regulator of immune responses, nuclear factor kappaB (p65), were mapped in 10 lymphoblastoid cell lines, and 25 and 7.5% of the respective binding regions were found to differ between individuals. Binding differences were frequently associated with single-nucleotide polymorphisms and genomic structural variants, and these differences were often correlated with differences in gene expression, suggesting functional consequences of binding variation. Furthermore, comparing PolII binding between humans and chimpanzee suggests extensive divergence in TF binding. Our results indicate that many differences in individuals and species occur at the level of TF binding, and they provide insight into the genetic events responsible for these differences.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2938768/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2938768/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasowski, Maya -- Grubert, Fabian -- Heffelfinger, Christopher -- Hariharan, Manoj -- Asabere, Akwasi -- Waszak, Sebastian M -- Habegger, Lukas -- Rozowsky, Joel -- Shi, Minyi -- Urban, Alexander E -- Hong, Mi-Young -- Karczewski, Konrad J -- Huber, Wolfgang -- Weissman, Sherman M -- Gerstein, Mark B -- Korbel, Jan O -- Snyder, Michael -- R01 CA077808/CA/NCI NIH HHS/ -- R01 CA077808-09/CA/NCI NIH HHS/ -- T32 GM007205/GM/NIGMS NIH HHS/ -- T32 GM007205-34/GM/NIGMS NIH HHS/ -- T32GM07205/GM/NIGMS NIH HHS/ -- U54 HG004558/HG/NHGRI NIH HHS/ -- U54 HG004558-04/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Apr 9;328(5975):232-5. doi: 10.1126/science.1183621. Epub 2010 Mar 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20299548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Cell Line ; Chromatin Immunoprecipitation ; DNA Copy Number Variations ; DNA, Intergenic ; Female ; *Gene Expression Regulation ; Humans ; Male ; Pan troglodytes/genetics ; *Polymorphism, Single Nucleotide ; Protein Binding ; RNA Polymerase II/genetics/*metabolism ; Sequence Analysis, DNA ; Species Specificity ; Transcription Factor RelA/genetics/*metabolism ; Transcription Initiation Site
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  • 4
    Publication Date: 2010-06-26
    Description: The factors determining species commonness and rarity are poorly understood, particularly in highly diverse communities. Theory predicts that interactions with neighbors of the same (conspecific) and other (heterospecific) species can influence a species' relative abundance, but empirical tests are lacking. By using a hierarchical model of survival for more than 30,000 seedlings of 180 tropical tree species on Barro Colorado Island, Panama, we tested whether species' sensitivity to neighboring individuals relates to their relative abundance in the community. We found wide variation among species in the effect of conspecific, but not heterospecific, neighbors on survival, and we found a significant relationship between the strength of conspecific neighbor effects and species abundance. Specifically, rare species suffered more from the presence of conspecific neighbors than common species did, suggesting that conspecific density dependence shapes species abundances in diverse communities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Comita, Liza S -- Muller-Landau, Helene C -- Aguilar, Salomon -- Hubbell, Stephen P -- New York, N.Y. -- Science. 2010 Jul 16;329(5989):330-2. doi: 10.1126/science.1190772. Epub 2010 Jun 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Center for Ecological Analysis and Synthesis, 735 State Street, Suite 300, Santa Barbara, CA 93101, USA. comita@nceas.ucsb.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20576853" target="_blank"〉PubMed〈/a〉
    Keywords: Bayes Theorem ; *Biodiversity ; *Ecosystem ; Panama ; Population Density ; Seedlings/growth & development ; Species Specificity ; *Trees/growth & development ; *Tropical Climate
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  • 5
    Publication Date: 2010-08-28
    Description: The organized societies of ants include short-lived worker castes displaying specialized behavior and morphology and long-lived queens dedicated to reproduction. We sequenced and compared the genomes of two socially divergent ant species: Camponotus floridanus and Harpegnathos saltator. Both genomes contained high amounts of CpG, despite the presence of DNA methylation, which in non-Hymenoptera correlates with CpG depletion. Comparison of gene expression in different castes identified up-regulation of telomerase and sirtuin deacetylases in longer-lived H. saltator reproductives, caste-specific expression of microRNAs and SMYD histone methyltransferases, and differential regulation of genes implicated in neuronal function and chemical communication. Our findings provide clues on the molecular differences between castes in these two ants and establish a new experimental model to study epigenetics in aging and behavior.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3772619/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3772619/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bonasio, Roberto -- Zhang, Guojie -- Ye, Chaoyang -- Mutti, Navdeep S -- Fang, Xiaodong -- Qin, Nan -- Donahue, Greg -- Yang, Pengcheng -- Li, Qiye -- Li, Cai -- Zhang, Pei -- Huang, Zhiyong -- Berger, Shelley L -- Reinberg, Danny -- Wang, Jun -- Liebig, Jurgen -- 2009005/Howard Hughes Medical Institute/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1068-71. doi: 10.1126/science.1192428.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, New York University School of Medicine, 522 First Avenue, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798317" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics ; Amino Acid Sequence ; Animals ; Ants/classification/*genetics/physiology ; Behavior, Animal ; DNA/chemistry/genetics ; Dinucleoside Phosphates/analysis ; *Epigenesis, Genetic ; Gene Expression Profiling ; Gene Expression Regulation ; *Genes, Insect ; *Genome ; Group III Histone Deacetylases/genetics/metabolism ; Hydrocarbons/metabolism ; Insect Proteins/chemistry/*genetics/metabolism ; MicroRNAs/genetics ; Molecular Sequence Data ; Protein Methyltransferases/genetics/metabolism ; Proteome ; Repetitive Sequences, Nucleic Acid ; Sequence Analysis, DNA ; Social Behavior ; Species Specificity ; Telomerase/genetics/metabolism
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  • 6
    Publication Date: 2010-09-18
    Description: Hybrids between species are often sterile or inviable because the long-diverged genomes of their parents cause developmental problems when they come together in a single individual. According to the Dobzhansky-Muller (DM) model, the number of genes involved in these "intrinsic postzygotic incompatibilities" should increase faster than linearly with the divergence time between species. This straightforward prediction of the DM model has remained contentious owing to a lack of explicit tests. Examining two pairs of Drosophila species, we show that the number of genes involved in postzygotic isolation increases at least as fast as the square of the number of substitutions (an index of divergence time) between species. This observation verifies a key prediction of the DM model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matute, Daniel R -- Butler, Ian A -- Turissini, David A -- Coyne, Jerry A -- R01GM058260/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1518-21. doi: 10.1126/science.1193440.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolution, The University of Chicago, 1101 East 57th Street, Chicago, IL 60637, USA. dmatute@uchicago.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847270" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Crosses, Genetic ; Drosophila/*genetics/physiology ; Drosophila melanogaster/genetics/physiology ; Epistasis, Genetic ; Female ; *Genes, Insect ; *Genetic Speciation ; *Hybridization, Genetic ; Infertility ; Male ; Models, Genetic ; Reproduction ; Species Specificity
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-08-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Daszak, Peter -- New York, N.Y. -- Science. 2010 Aug 6;329(5992):634-5. doi: 10.1126/science.1194089.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉EcoHealth Alliance (formerly Wildlife Trust), 460 West 34th Street, New York, NY 10001, USA. daszak@wildlifetrust.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20689004" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Wild ; *Chiroptera/microbiology/virology ; Communicable Diseases, Emerging/epidemiology/microbiology/*veterinary ; Dermatomycoses/epidemiology/microbiology/transmission/*veterinary ; Disease Susceptibility ; Extinction, Biological ; Host-Pathogen Interactions ; Humans ; Phylogeny ; Population Dynamics ; Population Surveillance ; RNA Virus Infections/epidemiology/transmission/*veterinary ; Rabies/epidemiology/transmission/*veterinary/virology ; Species Specificity ; Syndrome
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  • 8
    Publication Date: 2010-12-15
    Description: Powdery mildews are phytopathogens whose growth and reproduction are entirely dependent on living plant cells. The molecular basis of this life-style, obligate biotrophy, remains unknown. We present the genome analysis of barley powdery mildew, Blumeria graminis f.sp. hordei (Blumeria), as well as a comparison with the analysis of two powdery mildews pathogenic on dicotyledonous plants. These genomes display massive retrotransposon proliferation, genome-size expansion, and gene losses. The missing genes encode enzymes of primary and secondary metabolism, carbohydrate-active enzymes, and transporters, probably reflecting their redundancy in an exclusively biotrophic life-style. Among the 248 candidate effectors of pathogenesis identified in the Blumeria genome, very few (less than 10) define a core set conserved in all three mildews, suggesting that most effectors represent species-specific adaptations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spanu, Pietro D -- Abbott, James C -- Amselem, Joelle -- Burgis, Timothy A -- Soanes, Darren M -- Stuber, Kurt -- Ver Loren van Themaat, Emiel -- Brown, James K M -- Butcher, Sarah A -- Gurr, Sarah J -- Lebrun, Marc-Henri -- Ridout, Christopher J -- Schulze-Lefert, Paul -- Talbot, Nicholas J -- Ahmadinejad, Nahal -- Ametz, Christian -- Barton, Geraint R -- Benjdia, Mariam -- Bidzinski, Przemyslaw -- Bindschedler, Laurence V -- Both, Maike -- Brewer, Marin T -- Cadle-Davidson, Lance -- Cadle-Davidson, Molly M -- Collemare, Jerome -- Cramer, Rainer -- Frenkel, Omer -- Godfrey, Dale -- Harriman, James -- Hoede, Claire -- King, Brian C -- Klages, Sven -- Kleemann, Jochen -- Knoll, Daniela -- Koti, Prasanna S -- Kreplak, Jonathan -- Lopez-Ruiz, Francisco J -- Lu, Xunli -- Maekawa, Takaki -- Mahanil, Siraprapa -- Micali, Cristina -- Milgroom, Michael G -- Montana, Giovanni -- Noir, Sandra -- O'Connell, Richard J -- Oberhaensli, Simone -- Parlange, Francis -- Pedersen, Carsten -- Quesneville, Hadi -- Reinhardt, Richard -- Rott, Matthias -- Sacristan, Soledad -- Schmidt, Sarah M -- Schon, Moritz -- Skamnioti, Pari -- Sommer, Hans -- Stephens, Amber -- Takahara, Hiroyuki -- Thordal-Christensen, Hans -- Vigouroux, Marielle -- Wessling, Ralf -- Wicker, Thomas -- Panstruga, Ralph -- BB/E0009831/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E002803/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/H001948/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1543-6. doi: 10.1126/science.1194573.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Life Sciences, Imperial College London, London, UK. p.spanu@imperial.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21148392" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Ascomycota/*genetics/growth & development/metabolism/pathogenicity ; Carbohydrate Metabolism ; Carrier Proteins/genetics/metabolism ; Enzymes/genetics/metabolism ; Evolution, Molecular ; Fungal Proteins/chemistry/genetics/metabolism ; *Gene Deletion ; *Genes, Fungal ; *Genome, Fungal ; Hordeum/*microbiology ; Host-Pathogen Interactions/genetics ; Metabolic Networks and Pathways/genetics ; Molecular Sequence Annotation ; Plant Diseases/*microbiology ; Retroelements ; Sequence Analysis, DNA ; Species Specificity
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  • 9
    Publication Date: 2010-05-15
    Description: Prions are infectious proteins composed of the abnormal disease-causing isoform PrPSc, which induces conformational conversion of the host-encoded normal cellular prion protein PrPC to additional PrPSc. The mechanism underlying prion strain mutation in the absence of nucleic acids remains unresolved. Additionally, the frequency of strains causing chronic wasting disease (CWD), a burgeoning prion epidemic of cervids, is unknown. Using susceptible transgenic mice, we identified two prevalent CWD strains with divergent biological properties but composed of PrPSc with indistinguishable biochemical characteristics. Although CWD transmissions indicated stable, independent strain propagation by elk PrPC, strain coexistence in the brains of deer and transgenic mice demonstrated unstable strain propagation by deer PrPC. The primary structures of deer and elk prion proteins differ at residue 226, which, in concert with PrPSc conformational compatibility, determines prion strain mutation in these cervids.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4097672/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4097672/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Angers, Rachel C -- Kang, Hae-Eun -- Napier, Dana -- Browning, Shawn -- Seward, Tanya -- Mathiason, Candace -- Balachandran, Aru -- McKenzie, Debbie -- Castilla, Joaquin -- Soto, Claudio -- Jewell, Jean -- Graham, Catherine -- Hoover, Edward A -- Telling, Glenn C -- 1P01AI077774-01/AI/NIAID NIH HHS/ -- 2R01 NS040334-04/NS/NINDS NIH HHS/ -- N01-AI-25491/AI/NIAID NIH HHS/ -- P01 AI077774/AI/NIAID NIH HHS/ -- R01 NS049173/NS/NINDS NIH HHS/ -- T32 AI49795/AI/NIAID NIH HHS/ -- T32 DA022738/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 2010 May 28;328(5982):1154-8. doi: 10.1126/science.1187107. Epub 2010 May 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky Medical Center, Lexington, KY 40536, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20466881" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Brain/pathology ; Brain Chemistry ; *Deer ; Disease Susceptibility ; Mice ; Mice, Transgenic ; Mutation ; PrPC Proteins/*chemistry/genetics ; PrPSc Proteins/analysis/*chemistry/genetics/pathogenicity ; Protein Conformation ; Protein Folding ; Selection, Genetic ; Serial Passage ; Species Specificity ; *Wasting Disease, Chronic/pathology/transmission
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-07-10
    Description: Most firefly species (Coleoptera: Lampyridae) use bioluminescent flashes for signaling. In some species, the flashing between males occurs rhythmically and repeatedly (synchronically) with millisecond precision. We studied synchrony's behavioral role in the North American firefly, Photinus carolinus. We placed a female in a virtual environment containing artificial males that flashed at varying degrees of synchrony. Females responded to an average of 82% of synchronous flashes compared with as few as 3% of asynchronous flashes. We conclude that one function of flash synchrony is to facilitate a female's ability to recognize her conspecific male's flashing by eliminating potential visual clutter from other flashing males.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moiseff, Andrew -- Copeland, Jonathan -- New York, N.Y. -- Science. 2010 Jul 9;329(5988):181. doi: 10.1126/science.1190421.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology and Neurobiology, University of Connecticut, Storrs, CT 06269, USA. Andrew.Moiseff@UConn.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20616271" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Communication ; Animals ; Behavior, Animal ; Female ; Fireflies/*physiology ; *Light ; Male ; *Periodicity ; Species Specificity ; Vision, Ocular/physiology
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  • 11
    Publication Date: 2010-01-02
    Description: Although present in both humans and chimpanzees, recombination hotspots, at which meiotic crossover events cluster, differ markedly in their genomic location between the species. We report that a 13-base pair sequence motif previously associated with the activity of 40% of human hotspots does not function in chimpanzees and is being removed by self-destructive drive in the human lineage. Multiple lines of evidence suggest that the rapidly evolving zinc-finger protein PRDM9 binds to this motif and that sequence changes in the protein may be responsible for hotspot differences between species. The involvement of PRDM9, which causes histone H3 lysine 4 trimethylation, implies that there is a common mechanism for recombination hotspots in eukaryotes but raises questions about what forces have driven such rapid change.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3828505/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3828505/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Myers, Simon -- Bowden, Rory -- Tumian, Afidalina -- Bontrop, Ronald E -- Freeman, Colin -- MacFie, Tammie S -- McVean, Gil -- Donnelly, Peter -- 086084/Wellcome Trust/United Kingdom -- 086786/Wellcome Trust/United Kingdom -- 090532/Wellcome Trust/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2010 Feb 12;327(5967):876-9. doi: 10.1126/science.1182363. Epub 2009 Dec 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Statistics, Oxford University, 1 South Parks Road, Oxford OX1 3TG, UK. myers@stats.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20044541" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Crossing Over, Genetic ; DNA/metabolism ; Evolution, Molecular ; Histone-Lysine N-Methyltransferase/chemistry/*genetics/metabolism ; Histones/metabolism ; Humans ; Meiosis/*genetics ; Methylation ; Pan troglodytes/*genetics ; Polymorphism, Single Nucleotide ; *Recombination, Genetic ; Species Specificity
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-05-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Collinge, John -- MC_U123192748/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 May 28;328(5982):1111-2. doi: 10.1126/science.1190815.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Prion Unit, Institute of Neurology, University College London, London WC1N3BG, UK. j.collinge@prion.ucl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20508117" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Deer ; Evolution, Molecular ; Mutation ; Polymorphism, Genetic ; PrPC Proteins/*chemistry/genetics ; PrPSc Proteins/*chemistry/genetics/pathogenicity ; Protein Conformation ; Protein Folding ; Selection, Genetic ; Species Specificity ; *Wasting Disease, Chronic/transmission
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  • 13
    Publication Date: 2010-08-07
    Description: Although practiced clinically for more than 40 years, the use of hematopoietic stem cell (HSC) transplants remains limited by the ability to expand these cells ex vivo. An unbiased screen with primary human HSCs identified a purine derivative, StemRegenin 1 (SR1), that promotes the ex vivo expansion of CD34+ cells. Culture of HSCs with SR1 led to a 50-fold increase in cells expressing CD34 and a 17-fold increase in cells that retain the ability to engraft immunodeficient mice. Mechanistic studies show that SR1 acts by antagonizing the aryl hydrocarbon receptor (AHR). The identification of SR1 and AHR modulation as a means to induce ex vivo HSC expansion should facilitate the clinical use of HSC therapy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033342/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033342/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boitano, Anthony E -- Wang, Jian -- Romeo, Russell -- Bouchez, Laure C -- Parker, Albert E -- Sutton, Sue E -- Walker, John R -- Flaveny, Colin A -- Perdew, Gary H -- Denison, Michael S -- Schultz, Peter G -- Cooke, Michael P -- ES004869/ES/NIEHS NIH HHS/ -- ES007685/ES/NIEHS NIH HHS/ -- ES04699/ES/NIEHS NIH HHS/ -- P42 ES004699/ES/NIEHS NIH HHS/ -- P42 ES004699-24/ES/NIEHS NIH HHS/ -- R01 ES004869/ES/NIEHS NIH HHS/ -- R01 ES004869-23/ES/NIEHS NIH HHS/ -- R01 ES007685/ES/NIEHS NIH HHS/ -- R01 ES007685-11/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1345-8. doi: 10.1126/science.1191536. Epub 2010 Aug 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20688981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/analysis ; Antigens, CD34/analysis ; Aryl Hydrocarbon Hydroxylases/genetics/metabolism ; Cell Count ; Cell Lineage ; Cell Proliferation ; Cells, Cultured ; Cytochrome P-450 CYP1B1 ; Cytokines/pharmacology ; Glycoproteins/analysis ; Hematopoiesis ; *Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/cytology/drug effects/metabolism/*physiology ; Humans ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Multipotent Stem Cells/cytology/drug effects/physiology ; Peptides/analysis ; Purines/*metabolism/*pharmacology ; Receptors, Aryl Hydrocarbon/*antagonists & inhibitors/metabolism ; Signal Transduction ; Small Molecule Libraries ; Species Specificity ; Tetrachlorodibenzodioxin/pharmacology
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  • 14
    Publication Date: 2010-04-10
    Description: Transcription factors (TFs) direct gene expression by binding to DNA regulatory regions. To explore the evolution of gene regulation, we used chromatin immunoprecipitation with high-throughput sequencing (ChIP-seq) to determine experimentally the genome-wide occupancy of two TFs, CCAAT/enhancer-binding protein alpha and hepatocyte nuclear factor 4 alpha, in the livers of five vertebrates. Although each TF displays highly conserved DNA binding preferences, most binding is species-specific, and aligned binding events present in all five species are rare. Regions near genes with expression levels that are dependent on a TF are often bound by the TF in multiple species yet show no enhanced DNA sequence constraint. Binding divergence between species can be largely explained by sequence changes to the bound motifs. Among the binding events lost in one lineage, only half are recovered by another binding event within 10 kilobases. Our results reveal large interspecies differences in transcriptional regulation and provide insight into regulatory evolution.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3008766/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3008766/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schmidt, Dominic -- Wilson, Michael D -- Ballester, Benoit -- Schwalie, Petra C -- Brown, Gordon D -- Marshall, Aileen -- Kutter, Claudia -- Watt, Stephen -- Martinez-Jimenez, Celia P -- Mackay, Sarah -- Talianidis, Iannis -- Flicek, Paul -- Odom, Duncan T -- 062023/Wellcome Trust/United Kingdom -- 079643/Wellcome Trust/United Kingdom -- 15603/Cancer Research UK/United Kingdom -- 202218/European Research Council/International -- A15603/Cancer Research UK/United Kingdom -- WT062023/Wellcome Trust/United Kingdom -- WT079643/Wellcome Trust/United Kingdom -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2010 May 21;328(5981):1036-40. doi: 10.1126/science.1186176. Epub 2010 Apr 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Research UK, Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20378774" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Base Sequence ; Binding Sites ; Biological Evolution ; CCAAT-Enhancer-Binding Protein-alpha/*metabolism ; Chickens/genetics ; Chromatin Immunoprecipitation ; DNA/genetics/metabolism ; Dogs ; *Evolution, Molecular ; *Gene Expression Regulation ; *Genome ; Genome, Human ; Hepatocyte Nuclear Factor 4/*metabolism ; Humans ; Liver/*metabolism ; Mice ; Opossums/genetics ; Protein Binding ; Regulatory Sequences, Nucleic Acid ; Sequence Analysis, DNA ; Species Specificity ; Vertebrates/*genetics/metabolism
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  • 15
    Publication Date: 2010-02-06
    Description: Recent studies have identified range expansion as a potential driver of speciation. Yet it remains poorly understood how, under identical extrinsic settings, differential tendencies for geographic movement of taxa originate and subsequently affect diversification. We identified multiple traits that predict large distributional ranges in extant species of toads (Bufonidae) and used statistical methods to define and phylogenetically reconstruct an optimal range-expansion phenotype. Our results indicate that lineage-specific range-shifting abilities increased through an accumulation of adaptive traits that culminated in such a phenotype. This initiated the episode of global colonization and triggered the major radiation of toads. Evolution toward a range-expansion phenotype might be crucial to understanding both ancient widespread radiations and the evolutionary background of contemporary invasive species such as the cane toad.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Bocxlaer, Ines -- Loader, Simon P -- Roelants, Kim -- Biju, S D -- Menegon, Michele -- Bossuyt, Franky -- New York, N.Y. -- Science. 2010 Feb 5;327(5966):679-82. doi: 10.1126/science.1181707.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology Department, Amphibian Evolution Lab, Unit of Ecology and Systematics, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20133569" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Biological ; Africa ; Animals ; Asia ; Australia ; Bayes Theorem ; *Biological Evolution ; *Bufonidae/anatomy & histology/classification/genetics/physiology ; Genetic Speciation ; Geography ; Likelihood Functions ; Molecular Sequence Data ; Phenotype ; Phylogeny ; Population Dynamics ; Reproduction ; South America ; Species Specificity
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-07-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brashares, Justin S -- New York, N.Y. -- Science. 2010 Jul 23;329(5990):402-3. doi: 10.1126/science.1190095.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA. brashares@berkeley.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20651143" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Wild ; *Conservation of Natural Resources ; *Ecosystem ; Endangered Species ; *Extinction, Biological ; Population Dynamics ; Species Specificity
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  • 17
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-05-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGrew, William C -- New York, N.Y. -- Science. 2010 Apr 30;328(5978):579-80. doi: 10.1126/science.1187921.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Leverhulme Centre for Human Evolutionary Studies, University of Cambridge, Cambridge CB2 1QH, UK. wcm21@cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20431004" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Biological Evolution ; Gorilla gorilla ; Pan paniscus ; *Pan troglodytes ; Species Specificity ; *Tool Use Behavior
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  • 18
    Publication Date: 2010-05-08
    Description: From bacteria to fish, a remarkable variety of marine life depends on bioluminescence (the chemical generation of light) for finding food, attracting mates, and evading predators. Disparate biochemical systems and diverse phylogenetic distribution patterns of light-emitting organisms highlight the ecological benefits of bioluminescence, with biochemical and genetic analyses providing new insights into the mechanisms of its evolution. The origins and functions of some bioluminescent systems, however, remain obscure. Here, I review recent advances in understanding bioluminescence in the ocean and highlight future research efforts that will unite molecular details with ecological and evolutionary relationships.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Widder, E A -- New York, N.Y. -- Science. 2010 May 7;328(5979):704-8. doi: 10.1126/science.1174269.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ocean Research and Conservation Association, Fort Pierce, FL 34949, USA. ewidder@teamorca.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20448176" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; *Biological Evolution ; *Ecosystem ; Fishes/*physiology ; Gram-Negative Bacteria/classification/genetics/*physiology ; Invertebrates/*physiology ; Luciferases/metabolism ; *Luminescence ; Luminescent Measurements ; Luminescent Proteins ; Oceans and Seas ; *Seawater/microbiology ; Selection, Genetic ; Species Specificity ; Symbiosis
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  • 19
    Publication Date: 2010-07-10
    Description: The multicellular green alga Volvox carteri and its morphologically diverse close relatives (the volvocine algae) are well suited for the investigation of the evolution of multicellularity and development. We sequenced the 138-mega-base pair genome of V. carteri and compared its approximately 14,500 predicted proteins to those of its unicellular relative Chlamydomonas reinhardtii. Despite fundamental differences in organismal complexity and life history, the two species have similar protein-coding potentials and few species-specific protein-coding gene predictions. Volvox is enriched in volvocine-algal-specific proteins, including those associated with an expanded and highly compartmentalized extracellular matrix. Our analysis shows that increases in organismal complexity can be associated with modifications of lineage-specific proteins rather than large-scale invention of protein-coding capacity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2993248/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2993248/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prochnik, Simon E -- Umen, James -- Nedelcu, Aurora M -- Hallmann, Armin -- Miller, Stephen M -- Nishii, Ichiro -- Ferris, Patrick -- Kuo, Alan -- Mitros, Therese -- Fritz-Laylin, Lillian K -- Hellsten, Uffe -- Chapman, Jarrod -- Simakov, Oleg -- Rensing, Stefan A -- Terry, Astrid -- Pangilinan, Jasmyn -- Kapitonov, Vladimir -- Jurka, Jerzy -- Salamov, Asaf -- Shapiro, Harris -- Schmutz, Jeremy -- Grimwood, Jane -- Lindquist, Erika -- Lucas, Susan -- Grigoriev, Igor V -- Schmitt, Rudiger -- Kirk, David -- Rokhsar, Daniel S -- 5 P41 LM006252/LM/NLM NIH HHS/ -- R01 GM078376/GM/NIGMS NIH HHS/ -- R01 GM078376-01/GM/NIGMS NIH HHS/ -- R01 GM078376-02/GM/NIGMS NIH HHS/ -- R01 GM078376-03/GM/NIGMS NIH HHS/ -- R01 GM078376-04/GM/NIGMS NIH HHS/ -- R01 GM078376-04S1/GM/NIGMS NIH HHS/ -- R01 GM078376-05/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 9;329(5988):223-6. doi: 10.1126/science.1188800.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Department of Energy, Joint Genome Institute, Walnut Creek, CA 94598, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20616280" target="_blank"〉PubMed〈/a〉
    Keywords: Algal Proteins/*chemistry/*genetics/metabolism ; Biological Evolution ; Chlamydomonas reinhardtii/cytology/*genetics/growth & development/physiology ; DNA, Algal/genetics ; Evolution, Molecular ; Extracellular Matrix Proteins/chemistry/genetics ; Genes ; *Genome ; Molecular Sequence Data ; Protein Structure, Tertiary ; Repetitive Sequences, Nucleic Acid ; Sequence Analysis, DNA ; Species Specificity ; Synteny ; Volvox/cytology/*genetics/growth & development/physiology
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-11-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Greg -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1167. doi: 10.1126/science.330.6008.1167.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109642" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dendrites/ultrastructure ; Gorilla gorilla/anatomy & histology ; Hominidae/*anatomy & histology ; Humans ; Neural Pathways/ultrastructure ; Neurons/cytology/ultrastructure ; Pan paniscus/anatomy & histology ; Pan troglodytes/anatomy & histology ; Pongo/anatomy & histology ; Prefrontal Cortex/anatomy & histology/*ultrastructure ; Species Specificity
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  • 21
    Publication Date: 2010-02-27
    Description: Nitrogen (N2)-fixing microorganisms (diazotrophs) are an important source of biologically available fixed N in terrestrial and aquatic ecosystems and control the productivity of oligotrophic ocean ecosystems. We found that two major groups of unicellular N2-fixing cyanobacteria (UCYN) have distinct spatial distributions that differ from those of Trichodesmium, the N2-fixing cyanobacterium previously considered to be the most important contributor to open-ocean N2 fixation. The distributions and activity of the two UCYN groups were separated as a function of depth, temperature, and water column density structure along an 8000-kilometer transect in the South Pacific Ocean. UCYN group A can be found at high abundances at substantially higher latitudes and deeper in subsurface ocean waters than Trichodesmium. These findings have implications for the geographic extent and magnitude of basin-scale oceanic N2 fixation rates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moisander, Pia H -- Beinart, Roxanne A -- Hewson, Ian -- White, Angelicque E -- Johnson, Kenneth S -- Carlson, Craig A -- Montoya, Joseph P -- Zehr, Jonathan P -- New York, N.Y. -- Science. 2010 Mar 19;327(5972):1512-4. doi: 10.1126/science.1185468. Epub 2010 Feb 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ocean Sciences, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA. pmoisand@ucsc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20185682" target="_blank"〉PubMed〈/a〉
    Keywords: Biomass ; Cyanobacteria/genetics/growth & development/*isolation & purification/*metabolism ; *Ecosystem ; Genes, Bacterial ; Geography ; Light ; *Nitrogen Fixation ; Oxidoreductases/genetics ; Pacific Ocean ; Phytoplankton ; Polymerase Chain Reaction ; Seawater/chemistry/*microbiology ; Species Specificity ; Temperature
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  • 22
    Publication Date: 2010-03-27
    Description: Predators determine herbivore and plant biomass via so-called trophic cascades, and the strength of such effects is influenced by ecosystem productivity. To determine whether evolutionary trade-offs among plant traits influence patterns of trophic control, we manipulated predators and soil fertility and measured impacts of a major herbivore (the aphid Aphis nerii) on 16 milkweed species (Asclepias spp.) in a phylogenetic field experiment. Herbivore density was determined by variation in predation and trade-offs between herbivore resistance and plant growth strategy. Neither herbivore density nor predator effects on herbivores predicted the cascading effects of predators on plant biomass. Instead, cascade strength was strongly and positively associated with milkweed response to soil fertility. Accordingly, contemporary patterns of trophic control are driven by evolutionary convergent trade-offs faced by plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mooney, Kailen A -- Halitschke, Rayko -- Kessler, Andre -- Agrawal, Anurag A -- New York, N.Y. -- Science. 2010 Mar 26;327(5973):1642-4. doi: 10.1126/science.1184814.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697-2525 USA. mooneyk@uci.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339073" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aphids/*physiology ; Asclepias/growth & development/*physiology ; *Biological Evolution ; Biomass ; Cues ; *Ecosystem ; *Food Chain ; Population Density ; Predatory Behavior ; Sesquiterpenes/metabolism ; Soil ; Species Specificity
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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-07-10
    Description: The evolutionary origins of new lineages of pathogens are fundamental to understanding emerging diseases. Phylogenetic reconstruction based on DNA sequences has revealed the sister taxa of human pathogens, but the timing of host-switching events, including the human malaria pathogen Plasmodium falciparum, remains controversial. Here, we establish a rate for cytochrome b evolution in avian malaria parasites relative to its rate in birds. We found that the parasite cytochrome b gene evolves about 60% as rapidly as that of host cytochrome b, corresponding to approximately 1.2% sequence divergence per million years. This calibration puts the origin of P. falciparum at 2.5 million years ago (Ma), the initial radiation of mammalian Plasmodium at 12.8 Ma, and the contemporary global diversity of the Haemosporida across terrestrial vertebrates at 16.2 Ma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ricklefs, Robert E -- Outlaw, Diana C -- New York, N.Y. -- Science. 2010 Jul 9;329(5988):226-9. doi: 10.1126/science.1188954.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Missouri-St. Louis, One University Boulevard, St. Louis, MO 63121-4499, USA. ricklefs@umsl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20616281" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds/*genetics/*parasitology ; Cytochromes b/*genetics ; *Evolution, Molecular ; Genes, Mitochondrial ; *Genes, Protozoan ; Genetic Speciation ; Haemosporida/classification/*genetics ; Host-Parasite Interactions ; Humans ; Malaria, Avian/parasitology ; Mitochondria/chemistry ; *Phylogeny ; Plasmodium/classification/*genetics ; Plasmodium falciparum/classification/genetics ; Species Specificity ; Time
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  • 24
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-09-18
    Description: Among the reproductive barriers that can isolate species, hybrid sterility is frequently due to dysfunctional interactions between loci that accumulate between differentiating lineages. Theory describing the evolution of these incompatibilities has generated the prediction, still empirically untested, that loci underlying hybrid incompatibility should accumulate faster than linearly with time--the "snowball effect." We evaluated the accumulation of quantitative trait loci (QTL) between species in the plant group Solanum and found evidence for a faster-than-linear accumulation of hybrid seed sterility QTL, thus empirically evaluating and confirming this theoretical prediction. In comparison, loci underlying traits unrelated to hybrid sterility show no evidence for an accelerating rate of accumulation between species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moyle, Leonie C -- Nakazato, Takuya -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1521-3. doi: 10.1126/science.1193063.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Indiana University, Bloomington, IN 47405, USA. lmoyle@indiana.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847271" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; Chromosome Mapping ; Epistasis, Genetic ; *Genes, Plant ; *Genetic Speciation ; *Hybridization, Genetic ; Linear Models ; Lycopersicon esculentum/*genetics/physiology ; Models, Genetic ; Plant Infertility/*genetics ; Pollen/genetics/physiology ; *Quantitative Trait Loci ; Reproduction/genetics ; Seeds/genetics/physiology ; Solanum/*genetics/physiology ; Species Specificity
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 25
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-10-09
    Description: The systemic comparison of every newly determined amino acid sequence with all other known sequences may allow a complete reconstruction of the evolutionary events leading to contemporary proteins. But sometimes the surviving similarities are so vague that even computer-based sequence comparisons procedures are unable to validate relationships. In other cases similar sequences may appear in totally alien proteins as a result of mere chance or, occasionally, by the convergent evolution of sequences with special properties.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doolittle, R F -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):149-59.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280687" target="_blank"〉PubMed〈/a〉
    Keywords: *Amino Acid Sequence ; Animals ; *Biological Evolution ; Carrier Proteins/genetics ; Humans ; Proteins/classification/*genetics ; RNA Splicing ; RNA, Messenger/genetics ; Species Specificity
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  • 26
    Publication Date: 1981-10-30
    Description: The complement system of the nurse shark was investigated. Six functionally pure components were isolated from a single serum sample. Sequential reactions of the components with sensitized sheep erythrocytes resulted in membrane lesions indistinguishable from the "holes" caused by guinea pig complement.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jensen, J A -- Festa, E -- Smith, D S -- Cayer, M -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):566-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Complement System Proteins/*physiology ; Erythrocyte Membrane/immunology ; Hemolysis ; Sharks/*immunology ; Sheep ; Species Specificity
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  • 27
    Publication Date: 1981-07-31
    Description: The cell-to-cell channels in the junctions of an insect salivary gland and of insect and mammalian cells in culture were probed with fluorescent molecules-neutral linear oligosaccharides, neutral branched glycopeptides, and charged linear peptides. From the molecular dimensions of the largest permeants and smallest impermeants the permeation-limiting channel diameter was obtained: 16 to 20 angstroms for the mammalian cells and 20 to 30 angstroms for the insect cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwarzmann, G -- Wiegandt, H -- Rose, B -- Zimmerman, A -- Ben-Haim, D -- Loewenstein, W R -- CA 14464/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244653" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chironomidae ; Fluorescent Dyes ; Glycopeptides/*metabolism ; Intercellular Junctions/*ultrastructure ; Mice ; Mice, Inbred BALB C ; Models, Molecular ; Oligosaccharides/*metabolism ; Protein Conformation ; Salivary Glands/*ultrastructure ; Species Specificity
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  • 28
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-08-14
    Description: The aorta of the octopus, Octopus dofleini, is a highly distensible, elastic tube. The circumferential elastic modulus increases with inflation in the physiological range from abut 10(4) to 10(5) newtons per square meter. Rubber-like fibers have been isolated, apparently for the first time, from the aorta of an invertebrate. These fibers have an elastic modulus, like elastin, of about 4 x 10(5) newtons per square meter and are present in sufficient quantity to account for the elastic properties of the intact vessel under physiological conditions. Thus the circulatory system of an invertebrate animal provides an "elastic reservoir" (much like that of the vertebrate system), which increases the efficiency of the circulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shadwick, R E -- Gosline, J M -- New York, N.Y. -- Science. 1981 Aug 14;213(4509):759-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256277" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/anatomy & histology/*physiology ; Elasticity ; Octopodiformes/*physiology ; Proteins/physiology ; Species Specificity
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  • 29
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snell, G D -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):172-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017931" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Antigens, Neoplasm/genetics ; Antigens, Viral/genetics ; Antigens, Viral, Tumor ; Female ; Genetic Linkage ; Genotype ; H-2 Antigens/genetics ; Heterozygote ; *Major Histocompatibility Complex ; Male ; Mice ; Mice, Inbred Strains ; Neoplasms, Experimental/genetics/*immunology ; Pedigree ; Rats ; Species Specificity
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 30
    Publication Date: 1981-07-10
    Description: Southern blot hybridization was used to identify human and other vertebrate DNA sequences that were homologous to cloned DNA fragments containing the oncogenic nucleic acid sequences of three different type C mammalian retroviruses (simian sarcoma virus, the Snyder-Theilen strain of feline sarcoma virus, and the Harvey strain of murine sarcoma virus). Each onc gene counterpart has a single genetic locus, which probably contains non-onc intervening sequences. The human DNA sequences may represent genes important to cell growth or cell differentiation, or both. Their identification and isolation may allow elucidation of their role in these processes and in neoplasias.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wong-Staal, F -- Dalla-Favera, R -- Franchini, G -- Gelmann, E P -- Gallo, R C -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):226-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264598" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Cell Transformation, Viral ; *Cloning, Molecular ; DNA/*genetics ; DNA, Viral/*genetics ; *Genes ; Humans ; Nucleic Acid Hybridization ; Retroviridae/*genetics ; Sarcoma Virus, Woolly Monkey/genetics ; Sarcoma Viruses, Murine/genetics ; Species Specificity
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 31
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-10-02
    Description: The antigenic map of 17 methanogenic bacteria representing the entire range of available species was determined by multiple assay with antibody probes. Four major clusters of antigenically related strains coincide with the females proposed on the basis of 16S ribosomal RNA analysis. Immunological mapping uncovered relationships not yet shown by other methods and allowed identification and classification of two new bacterial isolates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Conway de Macario, E -- Wolin, M J -- Macario, A J -- NIAID AI-12461/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 2;214(4516):74-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6792708" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Bacterial/*analysis ; Archaea/classification/*immunology ; Bacteria/*immunology ; Euryarchaeota/classification/*immunology ; Species Specificity
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  • 32
    Publication Date: 1981-05-29
    Description: Immunoreactive substance P is present in the bullfrog retina, possibly in two types of stratified amacrine cells, with their somas in the inner nuclear layer and their neuronal processes entering the inner plexiform layer and ramifying in sublayers 3 or 4 (or both). Occasionally, polygonal somas positive for substance P were found in the ganglion cell layer. Approximately 75 percent of the cell bodies positive for substance P and 65 percent of the radioimmunoassayable substance P were found in the superior half of the frog retina. On the basis of high-performance liquid chromatography, the immunoreactive substance P in the neural retina of the rat, monkey, or chick is similar to synthetic substance P, whereas this is not true of the immunoreactive substance P in the bullfrog or carp retina.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eskay, R L -- Furness, J F -- Long, R T -- New York, N.Y. -- Science. 1981 May 29;212(4498):1049-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6165081" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chickens ; Fluorescent Antibody Technique ; Macaca ; Rana catesbeiana ; Rats ; Retina/analysis/*cytology ; Species Specificity ; Substance P/*analysis
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  • 33
    Publication Date: 1981-06-19
    Description: Concentrations of estradiol and progesterone in blood collected during the 12.5-day gestation period of the Virginia opossum were not significantly different from those during equivalent days of the estrous cycle. Progesterone was correlated with an index of corpora luteral mass. Ratio of estradiol to progesterone were highest 3 to 4 days before estrus and on the day of parturition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harder, J D -- Fleming, M W -- New York, N.Y. -- Science. 1981 Jun 19;212(4501):1400-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233228" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Corpus Luteum/physiology ; Estradiol/*blood ; Estrus ; Female ; Opossums/*physiology ; Pregnancy ; *Pregnancy, Animal ; Progesterone/*blood ; Species Specificity
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  • 34
    Publication Date: 1981-02-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lorch, I J -- Jeon, K W -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):949-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466367" target="_blank"〉PubMed〈/a〉
    Keywords: Amoeba/genetics/microbiology/*physiology ; Animals ; Cell Nucleus/physiology ; Cytoplasm/physiology ; Species Specificity ; *Symbiosis
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-05
    Description: Emotional, psychosocial, or anxiety-stimulated stress produces increased plasma concentrations of adrenal corticoids and other hormones though well-known neuroendocrine pathways. A direct consequence of these increased corticoid concentrations is injury to elements of the immunological apparatus, which may leve the subject vulnerable to the action of latent oncogenic viruses, newly transformed cancer cells, or other incipient pathological processes that are normally held in check by an intact immunological apparatus. This article describes studies that examine the adverse effects of increased plasma concentrations of adrenal corticoids on the thymus and thymus-dependent T cells, inasmuch as these elements constitute a major defense system against various neoplastic processes and other pathologies. The studies demonstrate that anxiety-stress can be quantitatively induced and the consequences measured through specific biochemical and cellular parameters, providing that authentic quiescent baselines of these conditions are obtained in the experimental animals by the use of low-stress protective housing and handling techniques.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Riley, V -- CA 12188/CA/NCI NIH HHS/ -- CA 16308/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1100-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233204" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Corticosterone/blood ; Female ; Handling (Psychology) ; Humans ; *Immunocompetence ; Leukocytes/physiology ; Mice ; Mice, Inbred Strains ; Neoplasms/*etiology/physiopathology/psychology ; Neoplasms, Experimental/*physiopathology ; Species Specificity ; Stress, Physiological/*complications ; Stress, Psychological/*complications ; Tumor Virus Infections/physiopathology
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  • 36
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-01-16
    Description: Isolated hydra mesoglea served as a suitable substrate for the attachment and spreading of hydra cells in vitro, irrespective of the species tested. Hydra cells did not attach and spread on substrates typically used for culturing mammalian cells. Mammalian and Drosophila cells attached and spread on plastic culture dishes but not on isolated mesoglea. Xenopus epithelial cells spread on both plastic and mesoglea. Because of the similarities of hydra mesoglea to vertebrate basement membranes, suggestions are offered for using mesoglea to study the interactions of epithelial cells with their basement membranes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Day, R M -- Lenhoff, H M -- New York, N.Y. -- Science. 1981 Jan 16;211(4479):291-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444468" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basement Membrane/physiology ; Biological Evolution ; Cell Adhesion ; Cell Line ; Epithelial Cells ; Extracellular Space/physiology ; Hydra/*cytology ; Species Specificity
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  • 37
    Publication Date: 1981-06-26
    Description: A new neuromuscular toxin, lophotoxin, has been isolated from several pacific gorgonians of the genus Lophogorgia. The structure of lophotoxin was deduced by combined spectrochemical methods, and belongs to the well-known cembrene class of diterpenoid molecules. Lophotoxin contains furanoaldehyde and alpha, beta-epoxy-gamma-lactone functional groups, in sharp contrast to the cationic ammonium functional groups of the established neurotoxins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fenical, W -- Okuda, R K -- Bandurraga, M M -- Culver, P -- Jacobs, R S -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1512-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6112796" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cnidaria/*analysis ; Cnidarian Venoms/*isolation & purification/pharmacology ; Diterpenes/*isolation & purification/pharmacology/toxicity ; Electric Stimulation ; Mice ; Muscle Contraction/drug effects ; Muscles/innervation ; Neuromuscular Junction/drug effects/physiology ; Species Specificity ; *Terpenes
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  • 38
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-01-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lappe, M -- Hooper, K -- Blake, E -- Pfund, N -- Gardner, E -- Rosenberg, J -- New York, N.Y. -- Science. 1981 Jan 23;211(4480):332-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7221543" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Assay ; *Carcinogens ; Dose-Response Relationship, Drug ; Humans ; Species Specificity
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  • 39
    Publication Date: 1981-04-03
    Description: Radioactive nitrogen-13 from nitrite (NO2-) or nitrate (NO3-) administered intratracheally or intravenously without added carrier to mice or rabbits was distributed evenly throughout most organs and tissues regardless of the entry route or the anion administered. Nitrogen-13 from both anions was distributed uniformly between plasma and blood cells. We found rapid in vivo oxidation of NO2- to NO3- at concentrations of 2 to 3 nanomoles per liter in blood. Over 50 percent oxidation within 10 minutes accounted for the similar nitrogen-13 distributions from both parent ions. The oxidation rates were animal species-dependent. No reduction of 13NO3- to 13NO2- was observed. A mechanistic hypothesis invoking oxidation of 13NO2- by a catalase-hydrogen peroxide complex accounts for the results. These results imply a concentration dependence for the in vivo fate of NO2- or nitrogen dioxide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parks, N J -- Krohn, K J -- Mathis, C A -- Chasko, J H -- Geiger, K R -- Gregor, M E -- Peek, N F -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):58-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromatography, High Pressure Liquid ; Injections, Intravenous ; Mice ; Mice, Inbred BALB C ; Nitrates/administration & dosage/*metabolism ; Nitrites/administration & dosage/*metabolism ; Nitrogen Isotopes ; Oxidation-Reduction ; Rabbits ; Species Specificity ; Tissue Distribution ; Trachea
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  • 40
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-03-20
    Description: Neurons sensitive to gonadal steroids are located strategically within neural circuits that mediate behaviors broadly related to the reproductive process. Some neuronal events and properties are regulated by these hormones. Variability in the occurrence and distribution of particular neural hormonal sensitivities across species may be related to variations in the hormonal requirements for sexual differentiation and for activation of reproductive behaviors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McEwen, B S -- NS07080/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1303-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259728" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/metabolism/physiology ; Animals ; Brain/enzymology/metabolism ; Estrogens/metabolism/physiology ; Female ; Gonadal Steroid Hormones/*physiology ; Gonads/secretion ; Humans ; Male ; Neurons/metabolism ; Progestins/metabolism ; Rats ; Receptors, Cell Surface/metabolism ; Receptors, Progesterone/metabolism ; *Sex Differentiation ; *Sexual Behavior ; Species Specificity ; Vertebrates/physiology
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  • 41
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-24
    Description: Hamsters deprived from birth of the neocortex developed normally and displayed the usual hamster-typical behavioral patterns. With the additional concurrent destruction of midline limbic convolutions (cingulate and underlying dorsal hippocampal), there were deficits in maternal behavior and a lack of development of play behavior. These findings demonstrate in a rodent (i) that the striatal complex and limbic system, along with the remaining neuraxis, are sufficient for giving expression to a wide range of unlearned forms of species-typical behavior and (ii) that midline limbic structures are required for the expression of play behavior and the integrated performance of maternal behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murphy, M R -- MacLean, P D -- Hamilton, S C -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):459-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244642" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; *Behavior, Animal ; Cerebral Cortex/*physiology ; Cricetinae ; Mesocricetus ; Species Specificity
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-04-24
    Description: Lists are presented of references to all known publications describing cell properties that serve to characterize (i) known strains of HeLa and purported human cell lines indicated as HeLa contaminants, (ii) strains of human cell lines contaminated with human but non-HeLa cells, and (iii) strains of cells contaminated by cells from one or more other species. Frequencies of cell cross-contaminations are cited and references are presented to relatively simple techniques that could serve to detect such contamination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson-Rees, W A -- Daniels, D W -- Flandermeyer, R R -- YO1 CP8-0500/CP/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 24;212(4493):446-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6451928" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Line ; Cells, Cultured/enzymology/*physiology ; Glucosephosphate Dehydrogenase/analysis ; Humans ; Isoenzymes/analysis ; Karyotyping ; Phosphoglucomutase/analysis ; Species Specificity
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  • 43
    Publication Date: 1981-10-30
    Description: Over the course of 20 weeks, Sprague-Dawley rats developed intestinal tumors in response to an intraperitoneal injection of the acetate derivative of dimethylnitrosamine. The same agent did not induce tumors in Lobund-Wistar rats. The number of tumors was significantly smaller in rats given drinking water containing indomethacin (beginning 14 days after the injections) than in control rats given drug-free water.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pollard, M -- Luckert, P H -- CA 00295/CA/NCI NIH HHS/ -- CA 15957/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):558-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291992" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dimethylnitrosamine/*analogs & derivatives/antagonists & inhibitors ; Indomethacin/*pharmacology ; Intestinal Neoplasms/*chemically induced ; Male ; Neoplasms, Experimental/chemically induced ; Rats ; Rats, Inbred Strains ; Species Specificity
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 44
    Publication Date: 1981-10-02
    Description: A monoclonal antibody (immunoglobulin G1) has been produced that reacts against myelin basic protein present in or extracted from the brains of many mammals-with certain important exceptions. Because of known species differences in amino acid sequences of basic protein and of certain peptide fragments, the binding site for this particular antibody appeared likely to include residues 130 to 137. Confirmation of this hypothesis was obtained by amino acid composition of the major immunoreactive peptides produced by thermolysin digestion of human basic protein and isolated by high-performance liquid chromatography.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sires, L R -- Hruby, S -- Alvord, E C Jr -- Hellstrom, I -- Hellstrom, K E -- Kies, M W -- Martemspm, R -- Deibler, G E -- Beckman, E D -- Casnellie, J E -- CA-19148/CA/NCI NIH HHS/ -- CA-25558/CA/NCI NIH HHS/ -- CA-26584/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 2;214(4516):87-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6169147" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Monoclonal ; Cattle ; Chickens ; Epitopes ; Guinea Pigs ; Humans ; Macaca ; Myelin Basic Protein/*immunology ; Peptide Fragments/immunology ; Rabbits ; Rats ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 45
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-11-20
    Description: Multiple efferent systems project to the retina in three species of teleost fish investigated with the horseradish peroxidase technique. These animals are the first vertebrates shown to have more than one central nervous system structure projecting to the retina. The connections discovered may reflect a primitive organization of retina-brain interconnections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ebbesson, S O -- Meyer, D L -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):924-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6171033" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axonal Transport ; Efferent Pathways/*physiology ; Fishes ; Horseradish Peroxidase ; Retina/*physiology ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 46
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-19
    Description: A small portion of the cytosine residues in the DNA of higher eukaryotes as well as in that of many lowe eukaryotes if methylated. The resulting 5-methylcytosine residues occur in specific in the DNA, usually adjacent to guanine residues on the 3' side. This methylation of eukaryotic DNA has been proposed to function in many ways, including control of transcription, maintenance of chromosome structure, repair of DNA, establishment of preferred sites for mutation, oncogenic transformation, and, in certain systems, protection of DNA against enzymatic degradation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ehrlich, M -- Wang, R Y -- CA-19942/CA/NCI NIH HHS/ -- GM-26986/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 19;212(4501):1350-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6262918" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine ; Animals ; Base Sequence ; Cytosine/*analogs & derivatives/analysis ; DNA/*genetics ; DNA Replication ; DNA Restriction Enzymes/metabolism ; *Genes ; Methylation ; Pyrimidines ; Species Specificity ; Substrate Specificity ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 47
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-04-03
    Description: An electric fish in the African family Mormyridae recognizes members of its own species by "listening" to electric organ discharges, which are species-specific signatures. Reactions of fish in the field and of individual electroreceptors to both normal and modified computer-synthesized discharges emphasize the importance of the waveform (time-domain cues) in species recognition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hopkins, C D -- Bass, A H -- MH26140/MH/NIMH NIH HHS/ -- NS06309/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):85-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209524" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Communication ; Animals ; Electric Organ/*physiology ; Female ; Fishes/*physiology ; Male ; Sex Factors ; Sexual Behavior, Animal/physiology ; Species Specificity ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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