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  • Animals  (69)
  • Base Sequence  (37)
  • Cell Line  (25)
  • American Association for the Advancement of Science (AAAS)  (89)
  • 1990-1994  (89)
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  • American Association for the Advancement of Science (AAAS)  (89)
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  • 1
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    Cyclic ADP-ribose in beta cells (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1993-10-22
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Islam, M S -- Larsson, O -- Berggren, P O -- New York, N.Y. -- Science. 1993 Oct 22;262(5133):584-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8211188" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Diphosphate Ribose/*analogs & derivatives/pharmacology/physiology ; Animals ; Calcium/*metabolism ; Cyclic ADP-Ribose ; Inositol Phosphates/pharmacology ; Islets of Langerhans/drug effects/*metabolism ; Mice ; Mice, Obese ; Microsomes/drug effects/metabolism ; Second Messenger Systems
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 2
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    Cyclic ADP-ribose and pancreatic beta cells (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1993-12-03
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Islam, M S -- Larsson, O -- Berggren, P O -- New York, N.Y. -- Science. 1993 Dec 3;262(5139):1499.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8248793" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Diphosphate Ribose/*analogs & derivatives/pharmacology ; Animals ; Cyclic ADP-Ribose ; Glucose/*pharmacology ; Islets of Langerhans/*drug effects ; Mice ; Mice, Obese
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 3
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    Molecular genetic analyses of the Tyrolean Ice Man (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1994-06-17
    Beschreibung: An approximately 5000-year-old mummified human body was recently found in the Tyrolean Alps. The DNA from tissue samples of this Late Neolithic individual, the so-called "Ice Man," has been extracted and analyzed. The number of DNA molecules surviving in the tissue was on the order of 10 genome equivalents per gram of tissue, which meant the only multi-copy sequences could be analyzed. The degradation of the DNA made the enzymatic amplification of mitochondrial DNA fragments of more than 100 to 200 base pairs difficult. One DNA sequence of a hypervariable segment of the mitochondrial control region was determined independently in two different laboratories from internal samples of the body. This sequence showed that the mitochondrial type of the Ice Man fits into the genetic variation of contemporary Europeans and that it was most closely related to mitochondrial types determined from central and northern European populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Handt, O -- Richards, M -- Trommsdorff, M -- Kilger, C -- Simanainen, J -- Georgiev, O -- Bauer, K -- Stone, A -- Hedges, R -- Schaffner, W -- New York, N.Y. -- Science. 1994 Jun 17;264(5166):1775-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Zoology, University of Munich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8209259" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Austria ; Base Sequence ; Biological Evolution ; Bone and Bones/chemistry ; Connective Tissue/chemistry ; DNA, Mitochondrial/chemistry/*genetics ; Europe ; Freezing ; History, Ancient ; Hominidae/*genetics ; Humans ; Male ; Molecular Sequence Data ; *Mummies ; Muscles/chemistry ; Polymerase Chain Reaction ; Sequence Analysis, DNA ; Templates, Genetic
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 4
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    Induction of cellular senescence in immortalized cells by human chromosome 1 (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1990-02-09
    Beschreibung: The control of cellular senescence by specific human chromosomes was examined in interspecies cell hybrids between diploid human fibroblasts and an immortal, Syrian hamster cell line. Most such hybrids exhibited a limited life span comparable to that of the human fibroblasts, indicating that cellular senescence is dominant in these hybrids. Karyotypic analyses of the hybrid clones that did not senesce revealed that all these clones had lost both copies of human chromosome 1, whereas all other human chromosomes were observed in at least some of the immortal hybrids. The application of selective pressure for retention of human chromosome 1 to the cell hybrids resulted in an increased percentage of hybrids that senesced. Further, the introduction of a single copy of human chromosome 1 to the hamster cells by microcell fusion caused typical signs of cellular senescence. Transfer of chromosome 11 had no effect on the growth of the cells. These findings indicate that human chromosome 1 may participate in the control of cellular senescence and further support a genetic basis for cellular senescence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sugawara, O -- Oshimura, M -- Koi, M -- Annab, L A -- Barrett, J C -- New York, N.Y. -- Science. 1990 Feb 9;247(4943):707-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2300822" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Line ; Cell Survival/*genetics ; Chromosome Mapping ; *Chromosomes, Human, Pair 1 ; Clone Cells ; Cricetinae ; Diploidy ; Fibroblasts/*cytology ; Humans ; Hybrid Cells/*cytology ; Hypoxanthine Phosphoribosyltransferase/genetics ; Karyotyping ; Mice ; Ploidies ; Transfection ; Translocation, Genetic ; X Chromosome
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 5
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    Two G protein oncogenes in human endocrine tumors (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1990-08-10
    Beschreibung: Somatic mutations in a subset of growth hormone (GH)-secreting pituitary tumors convert the gene for the alpha polypeptide chain (alpha s) of Gs into a putative oncogene, termed gsp. These mutations, which activate alpha s by inhibiting its guanosine triphosphatase (GTPase) activity, are found in codons for either of two amino acids, each of which is completely conserved in all known G protein alpha chains. The likelihood that similar mutations would activate other G proteins prompted a survey of human tumors for mutations that replace either of these two amino acids in other G protein alpha chain genes. The first gene so far tested, which encodes the alpha chain of Gi2, showed mutations that replaced arginine-179 with either cysteine or histidine in 3 of 11 tumors of the adrenal cortex and 3 of 10 endocrine tumors of the ovary. The mutant alpha i2 gene is a putative oncogene, referred to as gip2. In addition, gsp mutations were found in 18 of 42 GH-secreting pituitary tumors and in an autonomously functioning thyroid adenoma. These findings suggest that human tumors may harbor oncogenic mutations in various G protein alpha chain genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lyons, J -- Landis, C A -- Harsh, G -- Vallar, L -- Grunewald, K -- Feichtinger, H -- Duh, Q Y -- Clark, O H -- Kawasaki, E -- Bourne, H R -- New York, N.Y. -- Science. 1990 Aug 10;249(4969):655-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, Cetus Corporation, Emeryville CA 94608.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2116665" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; DNA, Neoplasm/genetics ; Endocrine System Diseases/*genetics ; Female ; GTP Phosphohydrolases/genetics/metabolism ; GTP-Binding Proteins/*genetics/metabolism ; Humans ; Male ; Molecular Sequence Data ; *Mutation ; Neoplasms/*genetics ; Oligonucleotide Probes ; *Oncogenes ; Pituitary Neoplasms/*genetics ; Polymerase Chain Reaction
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 6
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    Characterization of naturally occurring minor histocompatibility peptides including H-4 and H-Y (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1990-07-20
    Beschreibung: Minor histocompatibility (H) antigens can be peptides derived from cellular proteins that are presented on the cell surface by major histocompatibility complex (MHC) class I molecules. This is similar to viral antigens, because in both cases cytotoxic T lymphocytes (CTLs) recognize artificially produced peptides loaded on target cells. Naturally processed minor H peptides were found to be similar to those artificial CTL-epitopes, as far as size and hydrophobicity is concerned. The peptides studied were isolated from a transfectant that expressed a model CTL-defined antigen, beta-galactosidase, from male cells that express H-Y, which has been known operationally since 1955, and from cells that express H-4, known since 1961.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rotzschke, O -- Falk, K -- Wallny, H J -- Faath, S -- Rammensee, H G -- New York, N.Y. -- Science. 1990 Jul 20;249(4966):283-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Biologie, Abteilung Immungenetik, Tubingen, Federal Republic of Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1695760" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Epitopes/isolation & purification ; Female ; H-Y Antigen/*analysis/immunology ; Male ; Mice ; Mice, Inbred Strains ; Minor Histocompatibility Antigens/*analysis/immunology ; Molecular Sequence Data ; Peptides/chemical synthesis ; Species Specificity ; Spleen/immunology ; T-Lymphocytes, Cytotoxic/*immunology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 7
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    Conserved residues make similar contacts in two repressor-operator complexes (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1990-03-09
    Beschreibung: Comparison of a lambda repressor-operator complex and a 434 repressor-operator complex reveals that three conserved residues in the helix-turn-helix (HTH) region make similar contacts in each of the crystallographically determined structures. These conserved residues and their interactions with phosphodiester oxygens help establish a frame of reference within which other HTH residues make contacts that are critical for site-specific recognition. Such "positioning contacts" may be important conserved features within families of HTH proteins. In contrast, the structural comparisons appear to rule out any simple "recognition code" at the level of detailed side chain-base pair interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pabo, C O -- Aggarwal, A K -- Jordan, S R -- Beamer, L J -- Obeysekare, U R -- Harrison, S C -- GM 29109/GM/NIGMS NIH HHS/ -- GM 31471/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Mar 9;247(4947):1210-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2315694" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Asparagine ; Base Composition ; Base Sequence ; Binding Sites ; *DNA-Binding Proteins ; Glutamine ; Hydrogen Bonding ; Molecular Sequence Data ; Molecular Structure ; *Operator Regions, Genetic ; Protein Conformation ; Repressor Proteins/*metabolism ; Transcription Factors/*metabolism ; Viral Proteins ; Viral Regulatory and Accessory Proteins
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 8
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    HTLV-I trans-activator protein, tax, is a trans-repressor of the human beta-polymerase gene (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1990-03-02
    Beschreibung: Human T cell leukemia virus type I (HTLV-I) is the etiological agent for adult T cell leukemia (ATL). The HTLV-I trans-activator protein Tax can activate the expression of its own long terminal repeat (LTR) and many cellular and viral genes. Tax down-regulated the expression of human beta-polymerase (hu beta-pol), a cellular enzyme involved in host cell DNA repair. This finding suggests a possible correlation between HTLV-I infection and host chromosomal damage, which is often seen in ATL cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jeang, K T -- Widen, S G -- Semmes, O J 4th -- Wilson, S H -- New York, N.Y. -- Science. 1990 Mar 2;247(4946):1082-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2309119" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Sequence ; Cell Line ; Cell Line, Transformed ; DNA Polymerase I/*genetics ; DNA, Viral/genetics ; Gene Expression Regulation, Enzymologic ; Gene Expression Regulation, Viral ; Human T-lymphotropic virus 1/*genetics ; Humans ; Molecular Sequence Data ; Plasmids ; Promoter Regions, Genetic ; RNA, Messenger/biosynthesis ; Repetitive Sequences, Nucleic Acid ; Repressor Proteins/biosynthesis/*genetics ; Trans-Activators/biosynthesis/*genetics ; Transcription Factors/*genetics ; Transfection
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 9
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    Cloning of a factor required for activity of the Ah (dioxin) receptor (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1991-05-17
    Beschreibung: The aryl hydrocarbon (Ah) receptor binds various environmental pollutants, such as polycyclic aromatic hydrocarbons, heterocyclic amines, and polychlorinated aromatic compounds (dioxins, dibenzofurans, and biphenyls), and mediates the carcinogenic effects of these agents. The complementary DNA and part of the gene for an 87-kilodalton human protein that is necessary for Ah receptor function have been cloned. The protein is not the ligand-binding subunit of the receptor but is a factor that is required for the ligand-binding subunit to translocate from the cytosol to the nucleus after binding ligand. The requirement for this factor distinguishes the Ah receptor from the glucocorticoid receptor, to which the Ah receptor has been presumed to be similar. Two portions of the 87-kilodalton protein share sequence similarities with two Drosophila proteins, Per and Sim. Another segment of the protein shows conformity to the consensus sequence for the basic helix-loop-helix motif found in proteins that bind DNA as homodimers or heterodimers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffman, E C -- Reyes, H -- Chu, F F -- Sander, F -- Conley, L H -- Brooks, B A -- Hankinson, O -- CA 16048/CA/NCI NIH HHS/ -- CA 28868/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 May 17;252(5008):954-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of California, Los Angeles 90024.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1852076" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Aryl Hydrocarbon Receptor Nuclear Translocator ; Base Sequence ; Cell Line ; Cell Nucleus/metabolism ; Cloning, Molecular ; Cytosol/metabolism ; *DNA-Binding Proteins ; Humans ; Macromolecular Substances ; Molecular Sequence Data ; Molecular Weight ; Oligonucleotide Probes ; Proteins/*genetics/metabolism ; RNA, Messenger/genetics ; Receptors, Aryl Hydrocarbon ; Receptors, Drug/genetics/*metabolism ; Sequence Homology, Nucleic Acid ; Tetrachlorodibenzodioxin/*metabolism ; *Transcription Factors ; Transfection
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 10
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    Specific DNA binding by c-Myb: evidence for a double helix-turn-helix-related motif (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1991-09-06
    Beschreibung: The c-Myb protein is a sequence-specific DNA binding protein that activates transcription in hematopoietic cells. Three imperfect repeats (R1, R2, and R3) that contain regularly spaced tryptophan residues form the DNA binding domain of c-Myb. A fragment of c-Myb that contained the R2 and R3 regions bound specifically to a DNA sequence recognized by c-Myb plus ten additional base pairs at the 3' end of the element. The R2R3 fragment was predicted to contain two consecutive helix-turn-helix (HTH) motifs with unconventional turns. Mutagenesis of amino acids in R2R3 at positions that correspond to DNA-contacting amino acids in other HTH-containing proteins abolished specific DNA binding without affecting nonspecific DNA interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gabrielsen, O S -- Sentenac, A -- Fromageot, P -- New York, N.Y. -- Science. 1991 Sep 6;253(5024):1140-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire d'Ingenierie des Proteines, Centre d'Etudes de Saclay, Gif-sur-Yvette, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887237" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Base Sequence ; Binding Sites ; Chickens ; DNA/*metabolism ; DNA-Binding Proteins/*metabolism ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Oligonucleotide Probes ; Oncogenes ; Polymerase Chain Reaction ; Protein Conformation ; Proto-Oncogene Proteins/genetics/*metabolism ; Proto-Oncogene Proteins c-myb ; Recombinant Proteins/metabolism ; Restriction Mapping ; Sequence Homology, Nucleic Acid ; Transcription Factors/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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