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  • Articles  (430)
  • Humans  (430)
  • 1985-1989  (430)
  • 1988  (430)
  • Natural Sciences in General  (430)
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  • Articles  (430)
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  • 1985-1989  (430)
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  • 1
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    Molecular cloning of two types of GAP complementary DNA from human placenta (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: The ras p21 GTPase-activating protein (GAP) was purified from human placental tissue. Internal amino acid sequence was obtained from this 120,000-dalton protein and, by means of this sequence, two types of complementary DNA clones were isolated and characterized. One type encoded GAP with a predicted molecular mass of 116,000 daltons and 96% identity with bovine GAP. The messenger RNA of this GAP was detected in human lung, brain, liver, leukocytes, and placenta. The second type appeared to be generated by a differential splicing mechanism and encoded a novel form of GAP with a predicted molecular mass of 100,400 daltons. This protein lacks the hydrophobic amino terminus characteristic of the larger species, but retains GAP activity. The messenger RNA of this type was abundantly expressed in placenta and in several human cell lines, but not in adult tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trahey, M -- Wong, G -- Halenbeck, R -- Rubinfeld, B -- Martin, G A -- Ladner, M -- Long, C M -- Crosier, W J -- Watt, K -- Koths, K -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1697-700.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Cetus Corp., Emeryville, CA 94608.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201259" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Brain Chemistry ; *Cloning, Molecular ; DNA/*genetics/isolation & purification ; Female ; GTPase-Activating Proteins ; Gene Expression Regulation ; Humans ; Leukocytes/analysis ; Liver/analysis ; Lung/analysis ; Molecular Sequence Data ; Molecular Weight ; Nucleic Acid Hybridization ; Oligonucleotide Probes ; Placenta/*analysis ; Pregnancy ; Proteins/*genetics/isolation & purification ; RNA, Messenger/analysis/genetics ; Sequence Homology, Nucleic Acid ; ras GTPase-Activating Proteins
    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
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    Progress reported on mouse models for AIDS (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1638.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3059496" target="_blank"〉PubMed〈/a〉
    Keywords: *Acquired Immunodeficiency Syndrome/genetics/immunology/microbiology ; Animals ; Bone Marrow Transplantation ; *Disease Models, Animal ; HIV/genetics ; Humans ; Mice ; Mice, Transgenic ; National Institutes of Health (U.S.) ; United States
    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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  • 3
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    Infection of the SCID-hu mouse by HIV-1 (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: SCID-hu mice with human fetal thymic or lymph node implants were inoculated with the cloned human immunodeficiency virus-1 isolate, HIV-1JR-CSF. In a time- and dose-dependent fashion, viral replication spread within the human lymphoid organs. Combination immunohistochemistry and in situ hybridization revealed only viral RNA transcripts in most infected cells, but some cells had both detectable viral transcripts and viral protein. Infected cells were always more apparent in the medulla than in the cortex of the thymus. These studies demonstrate that an acute infection of human lymphoid organs with HIV-1 can be followed in the SCID-hu mouse.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Namikawa, R -- Kaneshima, H -- Lieberman, M -- Weissman, I L -- McCune, J M -- AR5P40RR03624-029/AR/NIAMS NIH HHS/ -- CA03352/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1684-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Stanford University School of Medicine, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201256" target="_blank"〉PubMed〈/a〉
    Keywords: *Acquired Immunodeficiency Syndrome ; Animals ; Chimera ; *Disease Models, Animal ; HIV/genetics/*physiology ; Humans ; Immunohistochemistry ; Lymph Nodes/microbiology/transplantation ; Mice ; Mice, Mutant Strains ; Nucleic Acid Hybridization ; RNA, Viral/genetics ; Thymus Gland/microbiology/transplantation ; Transcription, Genetic ; Viral Proteins/biosynthesis ; Virus Replication
    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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  • 4
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    Repair of the secretion defect in the Z form of alpha 1-antitrypsin by addition of a second mutation (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: Homozygous inheritance of the Z-type mutant form of the alpha 1-antitrypsin (alpha 1AT) gene results in the most common form of alpha 1AT deficiency, a human hereditary disease associated with a high risk for the development of emphysema and an increased incidence of neonatal hepatitis. The alpha 1AT-synthesizing cells of individuals with the Z gene have normal alpha 1AT messenger RNA levels, but alpha 1AT secretion is markedly reduced secondary to accumulation of newly synthesized alpha 1AT in the rough endoplasmic reticulum. Crystallographic analysis of alpha 1AT predicts that in normal alpha 1AT, a negatively charged Glu342 is adjacent to positively charged Lys290. Thus the Glu342----Lys342 Z mutation caused the loss of a normal salt bridge, resulting in the intracellular aggregation of the Z molecule. The prediction was made that a second mutation in the alpha 1AT genet that changed the positively charged Lys290 to a negatively charged Glu290 would correct the secretion defect. When the second mutation was added to the Z-type complementary DNA, the resulting gene directed the synthesis and secretion of amounts of alpha 1AT similar to that directed by the normal alpha 1AT complementary DNA in an in vitro eukaryotic expression system. This suggests the possibility that a human hereditary disease can be corrected by inserting an additional mutation in the same gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brantly, M -- Courtney, M -- Crystal, R G -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1700-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Pulmonary Branch, National Heart, Lung, and Blood Institute, Bethesda, MD.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2904702" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Codon ; DNA/genetics ; Electrochemistry ; Endoplasmic Reticulum/metabolism ; Glutamates ; Glutamic Acid ; Humans ; Lysine ; *Mutation ; Protein Conformation ; RNA, Messenger/metabolism ; Structure-Activity Relationship ; Transfection ; alpha 1-Antitrypsin/*genetics/secretion ; alpha 1-Antitrypsin Deficiency
    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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  • 5
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    Complementary hemispheric specialization in monkeys (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: Twenty-five split-brain monkeys were taught to discriminate two types of visual stimuli that engage lateralized cerebral processing in human subjects. Differential lateralization for the two kinds of discriminations was found; the left hemisphere was better at distinguishing between tilted lines and the right hemisphere was better at discriminating faces. These results indicate that lateralization of cognitive processing appeared in primates independently of language or handedness. In addition, cerebral lateralization in monkeys may provide an appropriate model for studying the biological basis of hemispheric specialization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hamilton, C R -- Vermeire, B A -- MH-34770/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1691-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201258" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*physiology ; Cognition/physiology ; Corpus Callosum/physiology ; Discrimination (Psychology)/physiology ; Facial Expression ; Functional Laterality/*physiology ; Hippocampus/physiology ; Humans ; Learning/physiology ; Macaca/*physiology ; Macaca mulatta/*physiology ; Optic Chiasm/physiology ; Orientation/physiology
    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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  • 6
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    Movement of the X chromosome in epilepsy (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: The position of selected chromosomes was assessed in samples of normal and epileptic human cortex with biotinylated probes specific for individual chromosome domains. Optical sectioning provided a rapid method for three-dimensional resolution of in situ hybridization signals in interphase cells, and solid models were reconstructed from digitized images for detailed rotational studies. There was a dramatic repositioning of the X chromosome in neurons of both males and females in electrophysiologically defined seizure foci. Other chromosomes (1, 9, and Y) showed more subtle positional changes. Specifically altered nuclear patterns involving the X chromosome may become established and create the genetic memory for intractable seizure activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borden, J -- Manuelidis, L -- CA15044/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1687-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Yale University School of Medicine, New Haven, CT 06510.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201257" target="_blank"〉PubMed〈/a〉
    Keywords: Astrocytes/ultrastructure ; Cell Nucleolus/ultrastructure ; Cell Nucleus/ultrastructure ; Cerebral Cortex/ultrastructure ; DNA Probes ; Epilepsy/*genetics/physiopathology ; Female ; Humans ; Image Processing, Computer-Assisted ; Male ; Microscopy, Electron ; Neurons/ultrastructure ; Nuclear Envelope/ultrastructure ; Nucleic Acid Hybridization ; *X Chromosome
    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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  • 7
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    Panel backs fetal tissue research (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culliton, B J -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1625-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201251" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Induced ; *Ethics, Medical ; *Fetus ; Humans ; Legislation, Medical ; *National Institutes of Health (U.S.) ; Research ; *Transplantation ; United States
    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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  • 8
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    Panel backs fetal tissue research (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culliton, Barbara J -- New York, N.Y. -- Science. 1988 Dec 23;242(4885):1625-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11659059" target="_blank"〉PubMed〈/a〉
    Keywords: *Aborted Fetus ; *Advisory Committees ; Attitude ; Central Nervous System Diseases ; Ethics ; Federal Government ; *Fetal Research ; *Fetal Tissue Transplantation ; *Fetus ; Financial Support ; Government ; Government Regulation ; Humans ; *National Institutes of Health (U.S.) ; *Public Policy ; Reference Standards ; *Research ; Social Control, Formal ; *Tissue Donors ; *Tissue and Organ Procurement ; United States
    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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  • 9
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    Point mutations in the human vitamin D receptor gene associated with hypocalcemic rickets (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: Hypocalcemic vitamin D-resistant rickets is a human genetic disease resulting from target organ resistance to the action of 1,25-dihydroxyvitamin D3. Two families with affected children homozygous for this autosomal recessive disorder were studied for abnormalities in the intracellular vitamin D receptor (VDR) and its gene. Although the receptor displays normal binding of 1,25-dihydroxyvitamin D3 hormone, VDR from affected family members has a decreased affinity for DNA. Genomic DNA isolated from these families was subjected to oligonucleotide-primed DNA amplification, and each of the nine exons encoding the receptor protein was sequenced for a genetic mutation. In each family, a different single nucleotide mutation was found in the DNA binding domain of the protein; one family near the tip of the first zinc finger (Gly----Asp) and one at the tip of the second zinc finger (Arg----Gly). The mutant residues were created in vitro by oligonucleotide directed point mutagenesis of wild-type VDR complementary DNA and this cDNA was transfected into COS-1 cells. The produced protein is biochemically indistinguishable from the receptor isolated from patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hughes, M R -- Malloy, P J -- Kieback, D G -- Kesterson, R A -- Pike, J W -- Feldman, D -- O'Malley, B W -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1702-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2849209" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Calcitriol/metabolism ; Cell Line ; Cell Line, Transformed ; Codon ; DNA/genetics/metabolism ; Exons ; Female ; Gene Amplification ; Homozygote ; Humans ; Hypocalcemia/*genetics ; Immunoblotting ; Male ; Molecular Sequence Data ; *Mutation ; Receptors, Calcitriol ; Receptors, Steroid/*genetics/metabolism ; Rickets/*genetics ; Transfection
    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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  • 10
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    Conflict over the molecular clock (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-23
    Description: Figure 3 (p. 1310) in the report "A 115-kD polypeptide immunologically related to erythrocyte band 3 is present in Golgi membranes" by S. Kellokumpu et al. (2 Dec., p. 1308) was incorrectly printed. The correct figure is reproduced below.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirsch, J A -- Krajewski, C -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1624.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201250" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; DNA/*genetics ; Hominidae/genetics ; Humans ; *Nucleic Acid Hybridization
    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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