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  • 1
    Publication Date: 2004-11-30
    Description: The widespread extinctions of large mammals at the end of the Pleistocene epoch have often been attributed to the depredations of humans; here we present genetic evidence that questions this assumption. We used ancient DNA and Bayesian techniques to reconstruct a detailed genetic history of bison throughout the late Pleistocene and Holocene epochs. Our analyses depict a large diverse population living throughout Beringia until around 37,000 years before the present, when the population's genetic diversity began to decline dramatically. The timing of this decline correlates with environmental changes associated with the onset of the last glacial cycle, whereas archaeological evidence does not support the presence of large populations of humans in Eastern Beringia until more than 15,000 years later.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, Beth -- Drummond, Alexei J -- Rambaut, Andrew -- Wilson, Michael C -- Matheus, Paul E -- Sher, Andrei V -- Pybus, Oliver G -- Gilbert, M Thomas P -- Barnes, Ian -- Binladen, Jonas -- Willerslev, Eske -- Hansen, Anders J -- Baryshnikov, Gennady F -- Burns, James A -- Davydov, Sergei -- Driver, Jonathan C -- Froese, Duane G -- Harington, C Richard -- Keddie, Grant -- Kosintsev, Pavel -- Kunz, Michael L -- Martin, Larry D -- Stephenson, Robert O -- Storer, John -- Tedford, Richard -- Zimov, Sergei -- Cooper, Alan -- New York, N.Y. -- Science. 2004 Nov 26;306(5701):1561-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Henry Wellcome Ancient Biomolecules Centre, Oxford University, South Parks Road, Oxford OX13PS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15567864" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Animals ; Bayes Theorem ; *Bison/classification/genetics ; Canada ; China ; *Climate ; DNA, Mitochondrial/genetics ; Environment ; *Fossils ; Genetic Variation ; Genetics, Population ; Human Activities ; Humans ; North America ; Phylogeny ; Population Dynamics ; Sequence Analysis, DNA ; Time
    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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  • 2
    Publication Date: 2014-01-31
    Description: Cultivated bacteria such as actinomycetes are a highly useful source of biomedically important natural products. However, such 'talented' producers represent only a minute fraction of the entire, mostly uncultivated, prokaryotic diversity. The uncultured majority is generally perceived as a large, untapped resource of new drug candidates, but so far it is unknown whether taxa containing talented bacteria indeed exist. Here we report the single-cell- and metagenomics-based discovery of such producers. Two phylotypes of the candidate genus 'Entotheonella' with genomes of greater than 9 megabases and multiple, distinct biosynthetic gene clusters co-inhabit the chemically and microbially rich marine sponge Theonella swinhoei. Almost all bioactive polyketides and peptides known from this animal were attributed to a single phylotype. 'Entotheonella' spp. are widely distributed in sponges and belong to an environmental taxon proposed here as candidate phylum 'Tectomicrobia'. The pronounced bioactivities and chemical uniqueness of 'Entotheonella' compounds provide significant opportunities for ecological studies and drug discovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, Micheal C -- Mori, Tetsushi -- Ruckert, Christian -- Uria, Agustinus R -- Helf, Maximilian J -- Takada, Kentaro -- Gernert, Christine -- Steffens, Ursula A E -- Heycke, Nina -- Schmitt, Susanne -- Rinke, Christian -- Helfrich, Eric J N -- Brachmann, Alexander O -- Gurgui, Cristian -- Wakimoto, Toshiyuki -- Kracht, Matthias -- Crusemann, Max -- Hentschel, Ute -- Abe, Ikuro -- Matsunaga, Shigeki -- Kalinowski, Jorn -- Takeyama, Haruko -- Piel, Jorn -- England -- Nature. 2014 Feb 6;506(7486):58-62. doi: 10.1038/nature12959. Epub 2014 Jan 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Institute of Microbiology, Eidgenossische Technische Hochschule Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland [2] Kekule Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany [3]. ; 1] Faculty of Science and Engineering, Waseda University Center for Advanced Biomedical Sciences, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan [2]. ; Institute for Genome Research and Systems Biology, Center for Biotechnology, Universitat Bielefeld, Universitatstrasse 25, 33594 Bielefeld, Germany. ; 1] Institute of Microbiology, Eidgenossische Technische Hochschule Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland [2] Kekule Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany. ; Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan. ; Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Wurzburg, Julius-von-Sachs-Platz 3, 97082 Wurzburg, Germany. ; Kekule Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany. ; Department of Earth and Environmental Sciences, Palaeontology and Geobiology, Ludwig Maximilians University Munich, Richard-Wagner-Strasse 10, 80333 Munich, Germany. ; Department of Energy Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, California 94598, USA. ; Institute of Microbiology, Eidgenossische Technische Hochschule Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland. ; Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. ; Faculty of Science and Engineering, Waseda University Center for Advanced Biomedical Sciences, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24476823" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biosynthetic Pathways/genetics ; Deltaproteobacteria/*classification/genetics/*metabolism/physiology ; *Drug Discovery ; Environmental Microbiology ; Genes, Bacterial/genetics ; Genome, Bacterial/genetics ; Metagenomics ; Molecular Sequence Data ; Multigene Family/genetics ; Peptides/metabolism ; Polyketides/metabolism ; Porifera/metabolism/microbiology ; Single-Cell Analysis ; Symbiosis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1987-07-03
    Description: The distribution of cells containing messenger RNA that encodes amyloid beta protein was determined in hippocampi and in various cortical regions from cynomolgus monkeys, normal humans, and patients with Alzheimer's disease by in situ hybridization. Both 35S-labeled RNA antisense and sense probes to amyloid beta protein messenger RNA were used to ensure specific hybridization. Messenger RNA for amyloid beta protein was expressed in a subset of neurons in the prefrontal cortex from monkeys, normal humans, and patients with Alzheimer's disease. This messenger RNA was also present in the neurons of all the hippocampal fields from monkeys, normal humans and, although to a lesser extent in cornu ammonis 1, patients with Alzheimer's disease. The distribution of amyloid beta protein messenger RNA was similar to that of the neurofibrillary tangles of Alzheimer's disease in some regions, but the messenger RNA was also expressed in other neurons that are not usually involved in the pathology of Alzheimer's disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bahmanyar, S -- Higgins, G A -- Goldgaber, D -- Lewis, D A -- Morrison, J H -- Wilson, M C -- Shankar, S K -- Gajdusek, D C -- AG05131/AG/NIA NIH HHS/ -- MH00519/MH/NIMH NIH HHS/ -- NS23038/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 3;237(4810):77-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3299701" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*genetics ; Amyloid/*genetics ; Amyloid beta-Peptides ; Animals ; Brain/*physiopathology ; Cerebral Cortex/physiology ; Gene Expression Regulation ; Hippocampus/physiology ; Humans ; Macaca fascicularis ; Nucleic Acid Hybridization ; RNA, Messenger/genetics
    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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