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  • Male  (50)
  • American Association for the Advancement of Science (AAAS)  (50)
  • American Association of Petroleum Geologists (AAPG)
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  • 1990-1994  (50)
  • 1975-1979
  • 1991  (50)
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  • American Association for the Advancement of Science (AAAS)  (50)
  • American Association of Petroleum Geologists (AAPG)
  • Cambridge University Press
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  • 1990-1994  (50)
  • 1975-1979
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  • 1
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    Subtle cerebellar phenotype in mice homozygous for a targeted deletion of the En-2 homeobox (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-03-08
    Description: The two mouse genes, En-1 and En-2, that are homologs of the Drosophila segmentation gene engrailed, show overlapping spatially restricted patterns of expression in the neural tube during embryogenesis, suggestive of a role in regional specification. Mice homozygous for a targeted mutation that deletes the homeobox were viable and showed no obvious defects in embryonic development. This may be due to functional redundancy of En-2 and the related En-1 gene product during embryogenesis. Consistent with this hypothesis, the mutant mice showed abnormal foliation in the adult cerebellum, where En-2, and not En-1, is normally expressed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Joyner, A L -- Herrup, K -- Auerbach, B A -- Davis, C A -- Rossant, J -- HD25334/HD/NICHD NIH HHS/ -- NS18381/NS/NINDS NIH HHS/ -- NS20591/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1991 Mar 8;251(4998):1239-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1672471" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blastocyst ; Cell Line ; Cerebellum/*anatomy & histology/embryology/pathology ; Chimera ; *Chromosome Deletion ; Female ; *Genes, Homeobox ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Nervous System/embryology ; Phenotype
    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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    Gallo concedes contamination (again) (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palca, J -- New York, N.Y. -- Science. 1991 Jun 7;252(5011):1369.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2047847" target="_blank"〉PubMed〈/a〉
    Keywords: *Hiv ; History, 20th Century ; Humans ; Male ; National Institutes of Health (U.S.) ; United States ; Virus Cultivation
    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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    Molecular nature of the Drosophila sex determination signal and its link to neurogenesis (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-03-01
    Description: In 1921 it was discovered that the sexual fate of Drosophila is determined by the ratio of X chromosomes to sets of autosomes. Only recently has it been found that the X chromosome to autosome (X:A) ratio is communicated in part by the dose of sisterless-b (sis-b), an X-linked genetic element located within the achaete-scute complex of genes involved in neurogenesis. In this report, the molecular nature of the primary sex determination signal and its relation to these proneural genes was determined by analysis of sis-b+ germline transformants. The sis-b+ function is confered by protein T4, a member of the helix-loop-helix family of transcription factors. Although T4 is shared by sis-b and scute-alpha, the regulatory regions of sis-b, which control T4 expression in sex determination, are both separable from and simpler than those of scute-alpha, which control T4 expression in neurogenesis. Dose-sensitive cooperative interactions in the assembly or binding of sis-dependent transcription factors may directly determine the activity of the female-specific promoter of Sex-lethal, the master regulator of sexual development. In this model there is no need to invoke the existence of analogous autosomal negative regulators of Sex-lethal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Erickson, J W -- Cline, T W -- GM 23468/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Mar 1;251(4997):1071-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1900130" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; DNA Mutational Analysis ; Dosage Compensation, Genetic ; Drosophila melanogaster/*genetics ; Female ; Genes ; Genes, Lethal ; Male ; *Nervous System Physiological Phenomena ; Restriction Mapping ; *Sex Determination Analysis ; Transcription, Genetic ; X Chromosome/physiology
    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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  • 4
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    Leadership shuffle at Sloan Kettering (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1991 Jun 7;252(5011):1372.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2047849" target="_blank"〉PubMed〈/a〉
    Keywords: Cancer Care Facilities/*organization & administration ; History, 20th Century ; Humans ; Male
    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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    Longitudinal studies of effects of divorce on children in Great Britain and the United States (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-07
    Description: National, longitudinal surveys from Great Britain and the United States were used to investigate the effects of divorce on children. In both studies, a subsample of children who were in two-parent families during the initial interview (at age 7 in the British data and at ages 7 to 11 in the U.S. data) were followed through the next interview (at age 11 and ages 11 to 16, respectively). At both time points in the British data, parents and teachers independently rated the children's behavior problems, and the children were given reading and mathematics achievement tests. At both time points in the U.S. data, parents rated the children's behavior problems. Children whose parents divorced or separated between the two time points were compared to children whose families remained intact. For boys, the apparent effect of separation or divorce on behavior problems and achievement at the later time point was sharply reduced by considering behavior problems, achievement levels, and family difficulties that were present at the earlier time point, before any of the families had broken up. For girls, the reduction in the apparent effect of divorce occurred to a lesser but still noticeable extent once preexisting conditions were considered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cherlin, A J -- Furstenberg, F F Jr -- Chase-Lansdale, L -- Kiernan, K E -- Robins, P K -- Morrison, D R -- Teitler, J O -- HD25936/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1991 Jun 7;252(5011):1386-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Sociology, Johns Hopkins University, Baltimore, MD 21218.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2047851" target="_blank"〉PubMed〈/a〉
    Keywords: Achievement ; Adolescent ; Child ; Child Behavior ; Divorce/*psychology ; England ; Female ; Humans ; Longitudinal Studies ; Male ; 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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  • 6
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    Name of the game? (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-09-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, C H -- New York, N.Y. -- Science. 1991 Sep 6;253(5024):1075.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887232" target="_blank"〉PubMed〈/a〉
    Keywords: *Ethics, Professional ; Female ; Humans ; Laboratories/organization & administration ; Male ; Research Support as Topic ; Scientific Misconduct ; 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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  • 7
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    Fatal sibling aggression, precocial development, and androgens in neonatal spotted hyenas (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-03
    Description: Fatal neonatal sibling aggression is common in predatory birds but has not been previously reported in wild mammals. Spotted hyena females are strongly masculinized, both anatomically and behaviorally, apparently by high levels of androgens during ontogeny. Neonates display elevated androgen levels, precocial motor development, and fully erupted front teeth. Litters are usually twins, and siblings fight violently at birth, apparently leading to the death of one sibling in same-sex litters, whereas in mixed-sex litters both siblings usually survive.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frank, L G -- Glickman, S E -- Licht, P -- MH39917/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1991 May 3;252(5006):702-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2024122" target="_blank"〉PubMed〈/a〉
    Keywords: Aggression/*physiology ; Androgens/*blood ; Animals ; Animals, Newborn/*physiology ; Behavior, Animal/*physiology ; Carnivora/*physiology ; Dentition ; Female ; Male ; Motor Activity/physiology ; *Sex Characteristics ; Sex Ratio ; Sibling Relations ; Tooth Eruption/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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  • 8
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    Multiple representations of pain in human cerebral cortex (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-03-15
    Description: The representation of pain in the cerebral cortex is less well understood than that of any other sensory system. However, with the use of magnetic resonance imaging and positron emission tomography in humans, it has now been demonstrated that painful heat causes significant activation of the contralateral anterior cingulate, secondary somatosensory, and primary somatosensory cortices. This contrasts with the predominant activation of primary somatosensory cortex caused by vibrotactile stimuli in similar experiments. Furthermore, the unilateral cingulate activation indicates that this forebrain area, thought to regulate emotions, contains an unexpectedly specific representation of pain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Talbot, J D -- Marrett, S -- Evans, A C -- Meyer, E -- Bushnell, M C -- Duncan, G H -- New York, N.Y. -- Science. 1991 Mar 15;251(4999):1355-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de neurophysiologie comportementale, Faculte de medecine dentaire, Universite de Montreal, Quebec, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2003220" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Anxiety/physiopathology ; Brain Mapping ; Cerebral Cortex/*physiology ; Functional Laterality ; Hot Temperature ; Humans ; Magnetic Resonance Imaging ; Male ; Pain/*physiopathology ; Tomography, Emission-Computed
    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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  • 9
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    Biology and homosexuality (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-11-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1991 Nov 1;254(5032):630.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1948038" target="_blank"〉PubMed〈/a〉
    Keywords: Brain/*physiology ; Female ; *Homosexuality ; Humans ; Male ; Sexual Behavior/*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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  • 10
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    Another sex survey bites the dust (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-09-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moffat, A S -- New York, N.Y. -- Science. 1991 Sep 27;253(5027):1483.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1896855" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/prevention & control ; Adolescent ; Adult ; Female ; *Health Surveys ; Humans ; Male ; National Institutes of Health (U.S.) ; *Sexual Behavior ; Sexually Transmitted Diseases/prevention & control ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 11
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    Maintenance of normoglycemia in diabetic mice by subcutaneous xenografts of encapsulated islets (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: The goal of islet transplantation in human diabetes is to maintain the islet grafts in the recipients without the use of immunosuppression. One approach is to encapsulate the donor islets in permselective membranes. Hollow fibers fabricated from an acrylic copolymer were used to encapsulate small numbers of rat islets that were immobilized in an alginate hydrogel for transplantation in diabetic mice. The fibers were biocompatible, prevented rejection, and maintained normoglycemia when transplanted intraperitoneally; hyperglycemia returned when the fibers were removed at 60 days. Normoglycemia was also maintained by subcutaneous implants that had an appropriately constructed outer surface on the fibers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lacy, P E -- Hegre, O D -- Gerasimidi-Vazeou, A -- Gentile, F T -- Dionne, K E -- DK01226/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1782-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1763328" target="_blank"〉PubMed〈/a〉
    Keywords: *Acrylic Resins ; Animals ; Animals, Newborn ; Blood Glucose/*metabolism ; Diabetes Mellitus, Experimental/blood/*surgery ; In Vitro Techniques ; Insulin/secretion ; Islets of Langerhans/*secretion ; Islets of Langerhans Transplantation/*physiology ; Male ; Membranes, Artificial ; Mice ; Mice, Inbred C57BL ; *Polyvinyl Chloride ; Rats ; Rats, Inbred WF ; Time Factors ; Transplantation, Heterologous
    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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  • 12
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    Unraveling the genetics of fragile X syndrome (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffman, M -- New York, N.Y. -- Science. 1991 May 24;252(5009):1070.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2031180" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Chromosome Mapping ; Female ; Fragile X Syndrome/*genetics ; Humans ; Male ; *Mutation ; 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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  • 13
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    Three-dimensional readout of flash x-ray images of living sperm in water by atomic-force microscopy (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-03
    Description: The imaging of living specimens in water by x-ray microscopy can be greatly enhanced with the use of an intense flash x-ray source and sophisticated technologies for reading x-ray images. A subnanosecond [corrected] x-ray pulse from a laser-produced plasma was used to record the x-ray image of living sea urchin sperm in an x-ray resist. The resist relief was visualized at high resolution by atomic-force microscopy. Internal structure of the sperm head was evident, and the carbon density in a flagellum was estimated from the relief height.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tomie, T -- Shimizu, H -- Majima, T -- Yamada, M -- Kanayama, T -- Kondo, H -- Yano, M -- Ono, M -- New York, N.Y. -- Science. 1991 May 3;252(5006):691-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Electrotechnical Laboratory, Ibaraki, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2024121" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/ultrastructure ; Male ; Methylmethacrylates ; Microscopy/*methods ; Mitochondria/ultrastructure ; *Sea Urchins ; Seawater ; Sperm Tail/*ultrastructure ; X-Rays
    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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  • 14
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    Inhibition of morphine tolerance and dependence by the NMDA receptor antagonist MK-801 (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-01-04
    Description: The N-methyl-D-aspartate (NMDA) subtype of the glutamate receptor is an important mediator of several forms of neural and behavioral plasticity. The present studies examined whether NMDA receptors might be involved in the development of opiate tolerance and dependence, two examples of behavioral plasticity. The noncompetitive NMDA receptor antagonist MK-801 attenuated the development of tolerance to the analgesic effect of morphine without affecting acute morphine analgesia. In addition, MK-801 attenuated the development of morphine dependence as assessed by naloxone-precipitated withdrawal. These results suggest that NMDA receptors may be important in the development of opiate tolerance and dependence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trujillo, K A -- Akil, H -- DA02265/DA/NIDA NIH HHS/ -- DA05336/DA/NIDA NIH HHS/ -- MH422251/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1991 Jan 4;251(4989):85-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mental Health Research Institute, University of Michigan, Ann Arbor 48109-0720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1824728" target="_blank"〉PubMed〈/a〉
    Keywords: *Analgesia ; Animals ; Behavior, Animal/drug effects ; Dizocilpine Maleate/*pharmacology ; Drug Tolerance ; Male ; *Morphine ; Naloxone/pharmacology ; Pain Measurement ; Rats ; Rats, Inbred Strains ; Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/*physiology ; *Substance-Related Disorders
    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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  • 15
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    The brain as "sexual organ" (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbons, A -- New York, N.Y. -- Science. 1991 Aug 30;253(5023):957-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887226" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*anatomy & histology/physiology ; Corpus Callosum/anatomy & histology/physiology ; Female ; Humans ; Hypothalamus/*anatomy & histology/physiology ; Male ; Rats ; *Sex Characteristics
    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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  • 16
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    A difference in hypothalamic structure between heterosexual and homosexual men (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-30
    Description: The anterior hypothalamus of the brain participates in the regulation of male-typical sexual behavior. The volumes of four cell groups in this region [interstitial nuclei of the anterior hypothalamus (INAH) 1, 2, 3, and 4] were measured in postmortem tissue from three subject groups: women, men who were presumed to be heterosexual, and homosexual men. No differences were found between the groups in the volumes of INAH 1, 2, or 4. As has been reported previously, INAH 3 was more than twice as large in the heterosexual men as in the women. It was also, however, more than twice as large in the heterosexual men as in the homosexual men. This finding indicates that INAH is dimorphic with sexual orientation, at least in men, and suggests that sexual orientation has a biological substrate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉LeVay, S -- New York, N.Y. -- Science. 1991 Aug 30;253(5023):1034-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Salk Institute for Biological Studies, San Diego, CA 92186.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887219" target="_blank"〉PubMed〈/a〉
    Keywords: Anterior Hypothalamic Nucleus/*anatomy & histology/cytology ; Female ; *Homosexuality ; Humans ; Male ; Optic Chiasm/anatomy & histology ; Sexual Behavior/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Dynamic tracking of cardiac vulnerability by complex demodulation of the T wave (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-19
    Description: A link is found between T wave alternans and vulnerability to ventricular fibrillation, and a new approach is provided for quantification of susceptibility to malignant arrhythmias. Complex demodulation reveals that alternation of the electrocardiogram is concentrated during the first half of the T wave, coinciding with the vulnerable period of the cardiac cycle. During myocardial ischemia and reperfusion, there are marked increases in the degree of T wave alternans that parallel the established time course of changes in vulnerability. The influence of the sympathetic nervous system in arrhythmogenesis is also accurately detected. Ultimately, complex demodulation of the electrocardiogram could provide a technique for identification and management of individuals at risk for sudden cardiac death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nearing, B D -- Huang, A H -- Verrier, R L -- HL-33567/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1991 Apr 19;252(5004):437-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Georgetown University School of Medicine, Washington, DC 20007.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2017682" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Constriction ; Coronary Vessels ; Dogs ; Electric Stimulation ; *Electrocardiography ; Electrophysiology ; Female ; Heart Conduction System/*physiopathology ; Kinetics ; Male ; Mathematics ; Reperfusion ; Ventricular Fibrillation/*physiopathology
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    Is homosexuality biological? (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1991 Aug 30;253(5023):956-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887225" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; *Homosexuality ; Humans ; Hypothalamus/cytology/*physiology ; Male ; Sex Characteristics ; Sexual Behavior/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 19
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    Using immunity to block conception (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-03-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1991 Mar 1;251(4997):1020-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1998115" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Contraception/*methods ; Egg Proteins/immunology ; Female ; Male ; Spermatozoa/immunology ; Vaccines
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 20
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    Oscillations of cytosolic sodium during calcium oscillations in exocrine acinar cells (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-11-15
    Description: In acinar cells from rat salivary glands, cholinergic agonists cause oscillations in cytoplasmic free calcium concentration, which then drive oscillations of cell volume that reflect oscillating cell solute content and fluid secretion. By quantitative fluorescence ratio microscopy of an intracellular indicator dye for sodium, it has now been shown that large amplitude oscillations of sodium concentration were associated with the calcium and cell volume oscillations. Both calcium and sodium oscillations were dependent on the continued presence of calcium in the extracellular medium and were abolished by the specific sodium-potassium adenosine triphosphatase inhibitor ouabain. Thus, calcium oscillations in salivary acinar cells, by modulating the activities of ion transport pathways in the plasma membrane, can cause significant oscillations of monovalent ions that may in turn feed back to regulate calcium oscillations and fluid secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wong, M M -- Foskett, J K -- New York, N.Y. -- Science. 1991 Nov 15;254(5034):1014-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Cell Biology, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1948071" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*physiology ; Chlorides/physiology ; Cytosol/physiology ; In Vitro Techniques ; Male ; Ouabain/pharmacology ; Parotid Gland/*physiology ; Periodicity ; Potassium/physiology ; Rats ; Rats, Inbred Strains ; Sodium/*physiology ; Water-Electrolyte Balance
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    Baltimore throws in the towel (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hamilton, D P -- New York, N.Y. -- Science. 1991 May 10;252(5007):768, 770.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1851328" target="_blank"〉PubMed〈/a〉
    Keywords: *Biomedical Research ; Federal Government ; Female ; Government Regulation ; Humans ; Male ; *Publishing ; *Scientific Misconduct ; Social Responsibility ; United States ; United States Office of Research Integrity
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  • 22
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    Activity and distribution of binding sites in brain of a nonpeptide substance P (NK1) receptor antagonist (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-01-25
    Description: CP-96,345, a nonpeptide substance P antagonist, is selective for the tachykinin NK1 receptor. The compound binds to a single population of sites in guinea pig brain and potently inhibits substance P-induced excitation of locus ceruleus neurons. CP-96,345 should be a useful tool for studying the action of substance P in the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McLean, S -- Ganong, A H -- Seeger, T F -- Bryce, D K -- Pratt, K G -- Reynolds, L S -- Siok, C J -- Lowe, J A 3rd -- Heym, J -- New York, N.Y. -- Science. 1991 Jan 25;251(4992):437-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Central Research Division, Pfizer Inc., Groton, CT 06340.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1703324" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Autoradiography ; Binding Sites ; Binding, Competitive ; Biphenyl Compounds/*metabolism/pharmacology ; Brain/*metabolism/radionuclide imaging ; Corpus Striatum/*metabolism/radionuclide imaging ; Guinea Pigs ; Hydrogen-Ion Concentration ; Male ; Receptors, Neurokinin-1 ; Receptors, Neurotransmitter/*antagonists & inhibitors/*metabolism ; Receptors, Tachykinin ; Spectrophotometry ; Substance P/metabolism ; Tachykinins/metabolism
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  • 23
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    Isolation of sequences that span the fragile X and identification of a fragile X-related CpG island (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-03-08
    Description: Yeast artificial chromosomes (YACs) were obtained from a 550-kilobase region that contains three probes previously mapped as very close to the locus of the fragile X syndrome. These YACs spanned the fragile site in Xq27.3 as shown by fluorescent in situ hybridization. An internal 200-kilobase segment contained four chromosomal breakpoints generated by induction of fragile X expression. A single CpG island was identified in the cloned region between markers DXS463 and DXS465 that appears methylated in mentally retarded fragile X males, but not in nonexpressing male carriers of the mutation nor in normal males. This CpG island may indicate the presence of a gene involved in the clinical phenotype of the syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heitz, D -- Rousseau, F -- Devys, D -- Saccone, S -- Abderrahim, H -- Le Paslier, D -- Cohen, D -- Vincent, A -- Toniolo, D -- Della Valle, G -- New York, N.Y. -- Science. 1991 Mar 8;251(4998):1236-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Genetique Moleculaire des Eucaryotes du CNRS, Institut de Chimie Biologique, Faculte de Medecine, Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2006411" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosomes, Fungal ; Cloning, Molecular ; DNA Probes ; *Dinucleoside Phosphates ; Fragile X Syndrome/*genetics ; Humans ; Male ; Molecular Sequence Data ; Mutation ; Nucleic Acid Hybridization ; Oligonucleotide Probes ; Polymerase Chain Reaction ; Reference Values ; Restriction Mapping ; Saccharomyces cerevisiae/genetics ; *X Chromosome
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    Stymied sex survey (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1991 Apr 26;252(5005):497.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2020848" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/prevention & control/transmission ; Female ; Humans ; Male ; National Institutes of Health (U.S.) ; Politics ; *Research Support as Topic ; *Sexual Behavior ; United States ; United States Dept. of Health and Human Services
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  • 25
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    Generation and analysis of interleukin-4 deficient mice (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-11-01
    Description: Interleukin-4 (IL-4) promotes the growth and differentiation of many hematopoietic cells in vitro; in particular, it directs the immunoglobulin (Ig) class switch to IgG1 and IgE. Mice homozygous for a mutation that inactivates the IL-4 gene were generated to test the requirement for IL-4 in vivo. In the mutant mice T and B cell development was normal, but the serum levels of IgG1 and IgE were strongly reduced. The IgG1 dominance in a T cell-dependent immune response was lost, and IgE was not detectable upon nematode infection. Thus, some but not all of the in vitro properties of IL-4 are critical for the physiology of the immune system in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuhn, R -- Rajewsky, K -- Muller, W -- New York, N.Y. -- Science. 1991 Nov 1;254(5032):707-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genetics, University of Cologne, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1948049" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Alleles ; Animals ; B-Lymphocytes/immunology ; Blotting, Southern ; Chromosome Deletion ; Concanavalin A ; DNA/genetics/isolation & purification ; Female ; Interleukin-4/deficiency/*genetics ; Lymph Nodes/growth & development/immunology ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Restriction Mapping ; Spleen/growth & development/immunology ; T-Lymphocytes/immunology ; Thymus Gland/growth & development/immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Genes for epilepsy mapped in the mouse (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-08-09
    Description: The neurological mutant mouse strain E1 is a model for complex partial seizures in humans. The inheritance of epileptic seizures with seven conventional chromosomal markers and over 60 endogenous proviral markers was studied by means of back-crosses of E1 with two seizure-resistant strains, DBA/2J and ABP/LeJ. The major gene responsible for this epileptic phenotype (El-1) was localized to a region distal with respect to the centromere on chromosome 9. At least one other gene, El-2, linked to proviral markers on chromosome 2, also influences the seizure phenotype. In addition, a potential modifier of seizures was detected in the DBA/2J background. The location of El-1 on distal chromosome 9 may allow identification of an epilepsy candidate gene in humans on the basis of conserved synteny with human chromosome 3.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rise, M L -- Frankel, W N -- Coffin, J M -- Seyfried, T N -- NS 23355/NS/NINDS NIH HHS/ -- R35CA44385/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 Aug 9;253(5020):669-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Boston College, Chestnut Hill 02167.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1871601" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; Crosses, Genetic ; Epilepsy/*genetics ; Female ; Genetic Predisposition to Disease ; Male ; Mice ; Mice, Inbred Strains ; Mice, Neurologic Mutants/*genetics ; Recombination, Genetic ; Seizures/genetics ; Software
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    Peripheral selection of the T cell repertoire (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-03-08
    Description: T lymphocytes undergo selection events not only in the thymus, but also after they leave the thymus and reside in the periphery. Peripheral selection was found to be dependent on T cell receptor (TCR)-ligand interactions but to differ from thymic selection with regard to specificity and mechanism. Unlike thymic selection, peripheral selection required binding of antigen to the TCR, and it induced expansion of T cell clones. Tolerance to self antigens that are restricted to the periphery occurred through the elimination of self-reactive T cells and by the clonal anergy, which was associated with down-regulation of the alpha beta TCR and CD8.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rocha, B -- von Boehmer, H -- New York, N.Y. -- Science. 1991 Mar 8;251(4998):1225-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Unite INSERM U-25 CNRS UA-122, Hopital Necker, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1900951" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD4/immunology ; Antigens, CD8 ; Antigens, Differentiation, T-Lymphocyte/immunology ; Cells, Cultured ; Down-Regulation ; Female ; Histocompatibility Antigens Class I/immunology ; Immunotherapy, Adoptive ; Male ; Mice ; Mice, Nude ; Receptors, Antigen, T-Cell/*physiology ; T-Lymphocytes/*immunology ; Thymectomy ; Thymus Gland/*immunology
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    Density-dependent natural selection and trade-offs in life history traits (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-07-26
    Description: Theories of density-dependent natural selection state that at extreme population densities evolution produces alternative life histories due to trade-offs. The trade-offs are presumed to arise because those genotypes with highest fitness at high population densities will not also have high fitness at low density and vice-versa. These predictions were tested by taking samples from six populations of Drosophila melanogaster kept at low population densities (r-populations) for nearly 200 generations and placing them in crowded cultures (K-populations). After 25 generations in the crowded cultures, the derived K-populations showed growth rate and productivity that at high densities were elevated relative to the controls, but at low density were depressed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mueller, L D -- Guo, P Z -- Ayala, F J -- S07 RR07008/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 26;253(5018):433-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, University of California, Irvine 92717.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1907401" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Crosses, Genetic ; Drosophila melanogaster/*genetics/growth & development/physiology ; Ecology ; Female ; Genetic Variation ; Male ; Models, Genetic ; Population Growth ; *Selection, Genetic
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    Access to engineering: new project for students and faculty with disabilities (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lollar, C -- New York, N.Y. -- Science. 1991 Feb 22;251(4996):952.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1825732" target="_blank"〉PubMed〈/a〉
    Keywords: *Disabled Persons ; *Engineering ; *Faculty ; Humans ; Male ; *Students ; United States
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    Effect of wnt-1 and related proteins on gap junctional communication in Xenopus embryos (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-24
    Description: The proto-oncogene wnt-1 (previously referred to as int-1) is thought to be important in embryonic pattern formation although its mechanisms of action are unknown. Premature and increased expression of the Wnt-1 protein, achieved by injection of synthetic wnt-1 RNA into fertilized Xenopus eggs, enhanced gap junctional communication between ventral cells of the developing embryo. This result is consistent with the hypothesis that Wnt proteins activate a receptor-mediated signal transduction pathway and that gap junctional communication can be a target of this pathway. The effects of two Wnt-1-related proteins on gap junctional communication were also investigated: overexpression of Xwnt-8 increased gap junctional coupling in a manner similar to Wnt-1, whereas Xwnt-5A did not. These findings are consistent with the existence of multiple receptors for Wnt proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olson, D J -- Christian, J L -- Moon, R T -- DE-07023/DE/NIDCR NIH HHS/ -- KO4-AR01837/AR/NIAMS NIH HHS/ -- R01-AR40089/AR/NIAMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1991 May 24;252(5009):1173-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Washington, School of Medicine, Seattle 98195.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2031187" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blastomeres/cytology/*physiology ; *Cell Communication ; Embryo, Nonmammalian/cytology/*physiology ; Female ; Intercellular Junctions/*physiology ; Male ; Protein-Tyrosine Kinases/genetics ; Proto-Oncogene Proteins/*genetics/physiology ; *Proto-Oncogenes ; Signal Transduction ; Sperm-Ovum Interactions ; Wnt Proteins ; Wnt1 Protein ; Xenopus ; Xenopus Proteins ; *Zebrafish Proteins
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    Depletion of CD4+ T cells in major histocompatibility complex class II-deficient mice (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-09-20
    Description: The maturation of T cells in the thymus is dependent on the expression of major histocompatibility complex (MHC) molecules. By disruption of the MHC class II Ab beta gene in embryonic stem cells, mice were generated that lack cell surface expression of class II molecules. These MHC class II-deficient mice were depleted of mature CD4+ T cells and were deficient in cell-mediated immune responses. These results provide genetic evidence that class II molecules are required for the maturation and function of mature CD4+ T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grusby, M J -- Johnson, R S -- Papaioannou, V E -- Glimcher, L H -- AI21569/AI/NIAID NIH HHS/ -- HD27295/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1991 Sep 20;253(5026):1417-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology, Harvard School of Public Health, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1910207" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD4/*immunology ; Crosses, Genetic ; Embryo, Mammalian ; Enzyme-Linked Immunosorbent Assay ; Female ; *Genes, MHC Class II ; Immunity, Cellular/genetics ; Immunoglobulin G/analysis/classification ; Immunoglobulin M/analysis ; Immunologic Deficiency Syndromes/*genetics ; *Lymphocyte Depletion ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Stem Cells/immunology ; T-Lymphocyte Subsets/*immunology
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    A corticosteroid receptor in neuronal membranes (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-06-28
    Description: Steroids may rapidly alter neuronal function and behavior through poorly characterized, direct actions on neuronal membranes. The membrane-bound receptors mediating these behavioral responses have not been identified. [3H]Corticosterone labels a population of specific, high-affinity recognition sites (dissociation constant = 0.51 nanomolar) in synaptic membranes from an amphibian brain. These binding sites were localized by receptor autoradiography in the neuropil, outside the regions of perikarya. The affinities of corticoids for this [3H]corticosterone binding site were linearly related to their potencies in rapidly suppressing male reproductive behavior. Thus, it appears that brain membranes contain a corticosteroid receptor that could participate in the regulation of behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orchinik, M -- Murray, T F -- Moore, F L -- New York, N.Y. -- Science. 1991 Jun 28;252(5014):1848-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, Oregon State University, Corvallis 97331.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2063198" target="_blank"〉PubMed〈/a〉
    Keywords: Amphibians ; Animals ; Autoradiography ; Binding, Competitive ; Brain/*metabolism ; Cell Fractionation ; Cell Membrane ; Corticosterone/*metabolism/pharmacology ; Kinetics ; Male ; Neurons/*metabolism ; Receptors, Glucocorticoid/*metabolism ; Sexual Behavior, Animal/drug effects ; Synaptosomes/metabolism ; Tritium
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    The sobering geography of AIDS (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palca, J -- New York, N.Y. -- Science. 1991 Apr 19;252(5004):372-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2017676" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*epidemiology/prevention & ; control/transmission ; Adolescent ; Adult ; Africa ; Asia ; Disease Outbreaks ; Female ; Humans ; Latin America ; Male ; Middle Aged ; North America ; World Health Organization
    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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    Sullivan overrules NIH on sex survey (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1991 Aug 2;253(5019):502.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1857975" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/prevention & control ; Adolescent ; Child ; Female ; *Health Surveys ; Humans ; Interviews as Topic ; Male ; National Institutes of Health (U.S.) ; Pregnancy ; Pregnancy in Adolescence ; *Research Design ; *Sexual Behavior ; United States ; United States Public Health Service/organization & administration
    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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    CARET study: women included (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sondik, E J -- New York, N.Y. -- Science. 1991 Oct 18;254(5030):360.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1925587" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Humans ; Lung Neoplasms/*prevention & control ; Male ; Sex Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 36
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    Dual role of the Drosophila pattern gene tailless in embryonic termini (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-18
    Description: One of the first zygotically active genes required for formation of the terminal domains of the Drosophila embryo is tailless (tll). Expression of the tll gene is activated ectopically in gain-of-function mutants of the maternal terminal gene torso (tor); this suggests that tor normally activates the tll gene in the termini. Ectopic expression of tll under the control of an inducible promoter results in differentiation of ectopic terminal-specific structures, the Filzkorper, and leads to the activation of at least one gene, hunchback, that is required to form these structures. Ectopic expression of the tll gene also represses segmentation by repressing the gap genes Kruppel and knirps and probably also pair rule genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steingrimsson, E -- Pignoni, F -- Liaw, G J -- Lengyel, J A -- 09948/PHS HHS/ -- New York, N.Y. -- Science. 1991 Oct 18;254(5030):418-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, Los Angeles 90024.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1925599" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila/embryology/*genetics ; Embryonic Development ; Female ; Genes, Regulator ; Heat-Shock Proteins/genetics ; Hot Temperature ; Male ; Mutation ; Phenotype ; Promoter Regions, Genetic
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    Does egg beckon sperm when the time is right? (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1991 Apr 12;252(5003):214.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2011761" target="_blank"〉PubMed〈/a〉
    Keywords: Chemotaxis ; Female ; Humans ; Male ; Ovum/*physiology ; *Sperm-Ovum Interactions
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 38
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    Quantitation of hepatic glycogenolysis and gluconeogenesis in fasting humans with 13C NMR (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-25
    Description: The rate of net hepatic glycogenolysis was assessed in humans by serially measuring hepatic glycogen concentration at 3- to 12-hour intervals during a 68-hour fast with 13C nuclear magnetic resonance spectroscopy. The net rate of gluconeogenesis was calculated by subtracting the rate of net hepatic glycogenolysis from the rate of glucose production in the whole body measured with tritiated glucose. Gluconeogenesis accounted for 64 +/- 5% (mean +/- standard error of the mean) of total glucose production during the first 22 hours of fasting. In the subsequent 14-hour and 18-hour periods of the fast, gluconeogenesis accounted for 82 +/- 5% and 96 +/- 1% of total glucose production, respectively. These data show that gluconeogenesis accounts for a substantial fraction of total glucose production even during the first 22 hours of a fast in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rothman, D L -- Magnusson, I -- Katz, L D -- Shulman, R G -- Shulman, G I -- DK-34576/DK/NIDDK NIH HHS/ -- DK-40936/DK/NIDDK NIH HHS/ -- MO1-RR-00125-26/RR/NCRR NIH HHS/ -- R01 DK040936/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1991 Oct 25;254(5031):573-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, 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/1948033" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Blood Glucose/metabolism ; Carbon Isotopes ; Fasting ; Female ; Glucagon/blood ; *Gluconeogenesis ; Humans ; Hydrocortisone/blood ; Insulin/blood ; Kinetics ; Liver/*metabolism ; Liver Glycogen/*metabolism ; Magnetic Resonance Spectroscopy/methods ; Male ; Nitrogen/*urine
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    LAV revisited: origins of the early HIV-1 isolates from Institut Pasteur (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-17
    Description: Two of the first human immunodeficiency virus type-1 (HIV-1) strains isolated were authenticated by reanalyzing original cultured samples stored at the Collection Nationale de Culture des Microorganismes as well as uncultured primary material. Cloned polymerase chain reaction products were used to analyze coding sequences of the V3 loop in the gp120 glycoprotein. The original isolate HIV-1 Bru, formerly called LAV, was derived from patient BRU. HIV-1 Lai was derived from patient LAI and contaminated a HIV-1 Bru culture between 20 July and 3 August 1983. The culture became, in effect, HIV-1 Lai, identifiable by a unique motif in the V3 loop. Because of this contamination two, rather than one, HIV-1 isolates were sent to the Laboratory of Tumor Cell Biology at the National Cancer Institute on 23 September 1983. Original HIV-1 Bru was indeed present in the sample marked JBB/LAV. However the M2T-/B sample harbored HIV-1 Lai, a strain capable of growing on established cell lines. The striking similarity between HIV-1 Lai (formerly LAV-Bru) and HTLV-3B sequences remains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wain-Hobson, S -- Vartanian, J P -- Henry, M -- Chenciner, N -- Cheynier, R -- Delassus, S -- Martins, L P -- Sala, M -- Nugeyre, M T -- Guetard, D -- New York, N.Y. -- Science. 1991 May 17;252(5008):961-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Retrovirologie Moleculaire, Institut Pasteur, Paris.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2035026" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes ; Acquired Immunodeficiency Syndrome/*microbiology/pathology ; Amino Acid Sequence ; Base Sequence ; Biopsy ; Cell Line ; Cloning, Molecular ; DNA, Viral/genetics/isolation & purification ; France ; HIV Envelope Protein gp120/*genetics ; HIV-1/classification/genetics/growth & development/*isolation & purification ; Humans ; Lymph Nodes/microbiology/pathology ; Male ; Molecular Sequence Data ; National Institutes of Health (U.S.) ; Oligonucleotide Probes ; Polymerase Chain Reaction/methods ; Sequence Homology, Nucleic Acid ; United States ; Virology/methods
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    Forecasting the global AIDS epidemic (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culotta, E -- New York, N.Y. -- Science. 1991 Aug 23;253(5022):852-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1876845" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*epidemiology/prevention & control ; *Computer Simulation ; Contraceptive Devices, Male ; *Developing Countries ; Female ; Humans ; International Cooperation ; Male ; Sexual Partners ; Uganda
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  • 41
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    Site-specific recombination between homologous chromosomes in Drosophila (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-17
    Description: The ability to mark a cell and its descendants genetically so that the resulting cell clone can be distinguished from neighboring cells facilitates studies in animal biology and development. A method of generating clones by inducing homologous mitotic recombination in Drosophila with a site-specific yeast recombinase is described. This method allows for frequent mosaicism after mitotic exchange is induced at predefined sites in the genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Golic, K G -- GM25874-09/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 May 17;252(5008):958-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics and Cell Biology, Howard Hughes Medical Institute, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2035025" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; Chromosomes/*physiology ; Crosses, Genetic ; Drosophila/*genetics ; Female ; Genotype ; Male ; Mitosis ; Models, Genetic ; Mosaicism ; *Recombination, Genetic
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    Instability of a 550-base pair DNA segment and abnormal methylation in fragile X syndrome (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-24
    Description: The fragile X syndrome, a common cause of inherited mental retardation, is characterized by an unusual mode of inheritance. Phenotypic expression has been linked to abnormal cytosine methylation of a single CpG island, at or very near the fragile site. Probes adjacent to this island detected very localized DNA rearrangements that constituted the fragile X mutations, and whose target was a 550-base pair GC-rich fragment. Normal transmitting males had a 150- to 400-base pair insertion that was inherited by their daughters either unchanged, or with small differences in size. Fragile X-positive individuals in the next generation had much larger fragments that differed among siblings and showed a generally heterogeneous pattern indicating somatic mutation. The mutated allele appeared unmethylated in normal transmitting males, methylated only on the inactive X chromosome in their daughters, and totally methylated in most fragile X males. However, some males had a mosaic pattern. Expression of the fragile X syndrome thus appears to result from a two-step mutation as well as a highly localized methylation. Carriers of the fragile X mutation can easily be detected regardless of sex or phenotypic expression, and rare apparent false negatives may result from genetic heterogeneity or misdiagnosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oberle, I -- Rousseau, F -- Heitz, D -- Kretz, C -- Devys, D -- Hanauer, A -- Boue, J -- Bertheas, M F -- Mandel, J L -- New York, N.Y. -- Science. 1991 May 24;252(5009):1097-102.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Genetique Moleculaire des Eucaryotes du CNRS, Institut de Chimie Biologique, Faculte de Medecine, Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2031184" target="_blank"〉PubMed〈/a〉
    Keywords: Base Composition ; DNA/*genetics ; Female ; Fragile X Syndrome/*genetics ; Gene Rearrangement ; Heterozygote Detection ; Humans ; Male ; Methylation ; *Mutation ; Pedigree ; Phenotype ; Restriction Mapping ; X Chromosome
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    Autocrine or paracrine inflammatory actions of corticotropin-releasing hormone in vivo (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-18
    Description: Corticotropin-releasing hormone (CRH) functions as a regulator of the hypothalamic-pituitary-adrenal axis and coordinator of the stress response. CRH receptors exist in peripheral sites of the immune system, and CRH promotes several immune functions in vitro. The effect of systemic immunoneutralization of CRH was tested in an experimental model of chemically induced aseptic inflammation in rats. Intraperitoneal administration of rabbit antiserum to CRH caused suppression of both inflammatory exudate volume and cell concentration by approximately 50 to 60 percent. CRH was detected in the inflamed area but not in the systemic circulation. Immunoreactive CRH is therefore produced in peripheral inflammatory sites where, in contrast to its systemic indirect immunosuppressive effects, it acts as an autocrine or paracrine inflammatory cytokine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karalis, K -- Sano, H -- Redwine, J -- Listwak, S -- Wilder, R L -- Chrousos, G P -- New York, N.Y. -- Science. 1991 Oct 18;254(5030):421-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Endocrinology Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1925600" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrageenan ; Corticotropin-Releasing Hormone/immunology/metabolism/*physiology ; Immune Sera ; Immunohistochemistry ; Inflammation/chemically induced/*metabolism ; Male ; Rats ; Rats, Inbred Strains ; Tumor Necrosis Factor-alpha/immunology/physiology
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    The true source of HIV? (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palca, J -- New York, N.Y. -- Science. 1991 May 10;252(5007):771.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1851330" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; HIV/*isolation & purification ; Humans ; Male ; United States ; United States Office of Research Integrity
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  • 45
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    Fragile X genotype characterized by an unstable region of DNA (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-24
    Description: DNA sequences have been located at the fragile X site by in situ hybridization and by the mapping of breakpoints in two somatic cell hybrids that were constructed to break at the fragile site. These hybrids were found to have breakpoints in a common 5-kilobase Eco RI restriction fragment. When this fragment was used as a probe on the chromosomal DNA of normal and fragile X genotype individuals, alterations in the mobility of the sequences detected by the probe were found only in fragile X genotype DNA. These sequences were of an increased size in all fragile X individuals and varied within families, indicating that the region was unstable. This probe provides a means with which to analyze fragile X pedigrees and is a diagnostic reagent for the fragile X genotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, S -- Pritchard, M -- Kremer, E -- Lynch, M -- Nancarrow, J -- Baker, E -- Holman, K -- Mulley, J C -- Warren, S T -- Schlessinger, D -- New York, N.Y. -- Science. 1991 May 24;252(5009):1179-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cytogenetics and Molecular Genetics, Adelaide Children's Hospital, South Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2031189" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Mapping ; DNA/*genetics ; Female ; Fragile X Syndrome/*genetics ; Genotype ; Humans ; Hybrid Cells/cytology ; Male ; Nucleic Acid Hybridization ; Reference Values ; Restriction Mapping ; X Chromosome
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    Baltimore case--in brief (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hamilton, D P -- New York, N.Y. -- Science. 1991 Jul 5;253(5015):24-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1648263" target="_blank"〉PubMed〈/a〉
    Keywords: Advisory Committees ; *Biomedical Research ; Federal Government ; Female ; Government Regulation ; Humans ; Male ; *Scientific Misconduct ; *Social Control, Formal ; United States ; *United States Office of Research Integrity
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    "Gene-spliced" fish experiments (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-11-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Powers, D A -- Chen, T T -- Dunham, R A -- New York, N.Y. -- Science. 1991 Nov 8;254(5033):779.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1948056" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Genetically Modified ; Female ; Fishes/*genetics ; *Genetic Engineering ; Growth Hormone/*genetics ; Male ; Ovum/physiology
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  • 48
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    Sex and the single gene (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cherfas, J -- New York, N.Y. -- Science. 1991 May 10;252(5007):782.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2028253" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Gene Expression Regulation/genetics ; Genes, Switch/*physiology ; Male ; Mice ; Mice, Transgenic ; *Sex Determination Analysis ; Sex Differentiation/physiology ; Testis/embryology ; *Y Chromosome
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    Looking for the father of us all (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-01-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbons, A -- New York, N.Y. -- Science. 1991 Jan 25;251(4992):378-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1989072" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; DNA/chemistry ; Humans ; Male ; *Y Chromosome
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    Is "gender gap" narrowing? (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1991 Aug 30;253(5023):959-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887227" target="_blank"〉PubMed〈/a〉
    Keywords: Child ; Female ; Humans ; Intelligence/*physiology ; Intelligence Tests ; Male ; *Sex Characteristics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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