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  • 1
    ISSN: 0192-8651
    Keywords: Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Computer Science
    Notes: We discuss issues in developing scalable parallel algorithms and focus on the distribution, as opposed to the replication, of key data structures. Replication of large data structures limits the maximum calculation size by imposing a low ratio of processors to memory. Only applications which distribute both data and computation across processors are truly scalable. The use of shared data structures that may be independently accessed by each process even in a distributed memory environment greatly simplifies development and provides a significant performance enhancement. We describe tools we have developed to support this programming paradigm. These tools are used to develop a highly efficient and scalable algorithm to perform self-consistent field calculations on molecular systems. A simple and classical strip-mining algorithm suffices to achieve an efficient and scalable Fock matrix construction in which all matrices are fully distributed. By strip mining over atoms, we also exploit all available sparsity and pave the way to adopting more sophisticated methods for summation of the Coulomb and exchange interactions. © 1996 by John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 1996-06-28
    Description: Because stimulation of CD4+ lymphocytes leads to activation of human immunodeficiency virus-type 1 (HIV-1) replication, viral spread, and cell death, adoptive CD4+ T cell therapy has not been possible. When antigen and CD28 receptors on cultured T cells were stimulated by monoclonal antibodies (mAbs) to CD3 and CD28 that had been immobilized, there was an increase in the number of polyclonal CD4+ T cells from HIV-infected donors. Activated cells predominantly secreted cytokines associated with T helper cell type 1 function. The HIV-1 viral load declined in the absence of antiretroviral agents. Moreover, CD28 stimulation of CD4+ T cells from uninfected donors rendered these cells highly resistant to HIV-1 infection. Immobilization of CD28 mAb was crucial to the development of HIV resistance, as cells stimulated with soluble CD28 mAb were highly susceptible to HIV infection. The CD28-mediated antiviral effect occurred early in the viral life cycle, before HIV-1 DNA integration. These data may facilitate immune reconstitution and gene therapy approaches in persons with HIV infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, B L -- Mosca, J D -- Riley, J L -- Carroll, R G -- Vahey, M T -- Jagodzinski, L L -- Wagner, K F -- Mayers, D L -- Burke, D S -- Weislow, O S -- St Louis, D C -- June, C H -- AI29331/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 28;272(5270):1939-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Naval Medical Research Institute, Bethesda, Maryland 20889, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658167" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal/immunology ; Antigens, CD28/*immunology ; Antigens, CD3/immunology ; CD4 Lymphocyte Count ; CD4-Positive T-Lymphocytes/cytology/*immunology/*virology ; Cell Division ; Cells, Cultured ; Chemokines/metabolism ; Cytokines/metabolism ; HIV Infections/immunology/*virology ; HIV-1/immunology/*physiology ; Humans ; Interleukin-2/pharmacology ; *Lymphocyte Activation ; Phytohemagglutinins/pharmacology ; Virus Integration ; 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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  • 3
    Publication Date: 1996-10-25
    Description: The human genome is thought to harbor 50,000 to 100,000 genes, of which about half have been sampled to date in the form of expressed sequence tags. An international consortium was organized to develop and map gene-based sequence tagged site markers on a set of two radiation hybrid panels and a yeast artificial chromosome library. More than 16,000 human genes have been mapped relative to a framework map that contains about 1000 polymorphic genetic markers. The gene map unifies the existing genetic and physical maps with the nucleotide and protein sequence databases in a fashion that should speed the discovery of genes underlying inherited human disease. The integrated resource is available through a site on the World Wide Web at http://www.ncbi.nlm.nih.gov/SCIENCE96/.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schuler, G D -- Boguski, M S -- Stewart, E A -- Stein, L D -- Gyapay, G -- Rice, K -- White, R E -- Rodriguez-Tome, P -- Aggarwal, A -- Bajorek, E -- Bentolila, S -- Birren, B B -- Butler, A -- Castle, A B -- Chiannilkulchai, N -- Chu, A -- Clee, C -- Cowles, S -- Day, P J -- Dibling, T -- Drouot, N -- Dunham, I -- Duprat, S -- East, C -- Edwards, C -- Fan, J B -- Fang, N -- Fizames, C -- Garrett, C -- Green, L -- Hadley, D -- Harris, M -- Harrison, P -- Brady, S -- Hicks, A -- Holloway, E -- Hui, L -- Hussain, S -- Louis-Dit-Sully, C -- Ma, J -- MacGilvery, A -- Mader, C -- Maratukulam, A -- Matise, T C -- McKusick, K B -- Morissette, J -- Mungall, A -- Muselet, D -- Nusbaum, H C -- Page, D C -- Peck, A -- Perkins, S -- Piercy, M -- Qin, F -- Quackenbush, J -- Ranby, S -- Reif, T -- Rozen, S -- Sanders, C -- She, X -- Silva, J -- Slonim, D K -- Soderlund, C -- Sun, W L -- Tabar, P -- Thangarajah, T -- Vega-Czarny, N -- Vollrath, D -- Voyticky, S -- Wilmer, T -- Wu, X -- Adams, M D -- Auffray, C -- Walter, N A -- Brandon, R -- Dehejia, A -- Goodfellow, P N -- Houlgatte, R -- Hudson, J R Jr -- Ide, S E -- Iorio, K R -- Lee, W Y -- Seki, N -- Nagase, T -- Ishikawa, K -- Nomura, N -- Phillips, C -- Polymeropoulos, M H -- Sandusky, M -- Schmitt, K -- Berry, R -- Swanson, K -- Torres, R -- Venter, J C -- Sikela, J M -- Beckmann, J S -- Weissenbach, J -- Myers, R M -- Cox, D R -- James, M R -- Bentley, D -- Deloukas, P -- Lander, E S -- Hudson, T J -- HG00098/HG/NHGRI NIH HHS/ -- HG00206/HG/NHGRI NIH HHS/ -- HG00835/HG/NHGRI NIH HHS/ -- Wellcome Trust/United Kingdom -- etc. -- New York, N.Y. -- Science. 1996 Oct 25;274(5287):540-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8849440" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; *Chromosome Mapping ; Chromosomes, Artificial, Yeast ; Computer Communication Networks ; DNA, Complementary/genetics ; Databases, Factual ; Gene Expression ; Genetic Markers ; *Genome, Human ; *Human Genome Project ; Humans ; Multigene Family ; RNA, Messenger/genetics ; Sequence Homology, Nucleic Acid ; Sequence Tagged Sites
    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
    Publication Date: 1996-05-17
    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
    Publication Date: 1996-06-28
    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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  • 6
    Publication Date: 1996-10-25
    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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  • 7
    Publication Date: 1996-03-08
    Description: Friedreich's ataxia (FRDA) is an autosomal recessive, degenerative disease that involves the central and peripheral nervous systems and the heart. A gene, X25, was identified in the critical region for the FRDA locus on chromosome 9q13. This gene encodes a 210-amino acid protein, frataxin, that has homologs in distant species such as Caenorhabditis elegans and yeast. A few FRDA patients were found to have point mutations in X25, but the majority were homozygous for an unstable GAA trinucleotide expansion in the first X25 intron.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Campuzano, V -- Montermini, L -- Molto, M D -- Pianese, L -- Cossee, M -- Cavalcanti, F -- Monros, E -- Rodius, F -- Duclos, F -- Monticelli, A -- Zara, F -- Canizares, J -- Koutnikova, H -- Bidichandani, S I -- Gellera, C -- Brice, A -- Trouillas, P -- De Michele, G -- Filla, A -- De Frutos, R -- Palau, F -- Patel, P I -- Di Donato, S -- Mandel, J L -- Cocozza, S -- Koenig, M -- Pandolfo, M -- 722/Telethon/Italy -- NS34192/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1996 Mar 8;271(5254):1423-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department de Genetica, University of Valencia, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8596916" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Base Sequence ; Chromosomes, Human, Pair 9/*genetics ; DNA Primers ; Female ; Friedreich Ataxia/*genetics ; Genes, Recessive ; Heterozygote ; Humans ; *Introns ; *Iron-Binding Proteins ; Male ; Molecular Sequence Data ; Pedigree ; Point Mutation ; Polymerase Chain Reaction ; Proteins/chemistry/*genetics ; Sequence Alignment ; *Trinucleotide Repeats
    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
    Publication Date: 1996-08-09
    Description: alpha2-Adrenergic receptors (alpha2ARs) present in the brainstem decrease blood pressure and are targets for clinically effective antihypertensive drugs. The existence of three alpha2AR subtypes, the lack of subtype-specific ligands, and the cross-reactivity of alpha2AR agonists with imidazoline receptors has precluded an understanding of the role of individual alpha2AR subtypes in the hypotensive response. Gene targeting was used to introduce a point mutation into the alpha2aAR subtype in the mouse genome. The hypotensive response to alpha2AR agonists was lost in the mutant mice, demonstrating that the alpha2aAR subtype plays a principal role in this response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacMillan, L B -- Hein, L -- Smith, M S -- Piascik, M T -- Limbird, L E -- HL38120/HL/NHLBI NIH HHS/ -- HL43671/HL/NHLBI NIH HHS/ -- HL48638/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 9;273(5276):801-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8670421" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic alpha-2 Receptor Agonists ; Adrenergic alpha-Agonists/pharmacology ; Animals ; Antihypertensive Agents/pharmacology ; Base Sequence ; Blood Pressure/drug effects/*physiology ; Brain Stem/physiology ; Brimonidine Tartrate ; Gene Targeting ; Heart Rate/drug effects/physiology ; Imidazoles/pharmacology ; Medetomidine ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Point Mutation ; Quinoxalines/pharmacology ; Receptors, Adrenergic, alpha-2/genetics/metabolism/*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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  • 9
    Publication Date: 1996-05-17
    Description: Candidate pre-main-sequence stars were observed in the bar of the Large Magellanic Cloud during the search for dark matter in the galactic halo. Seven blue stars of apparent visual magnitude 15 to 17 had irregular photometric variations and hydrogen emission lines in their optical spectra, which suggested that these stars are pre-main-sequence stars of about 10 solar masses. These stars are slightly more massive and definitely more luminous than are Herbig AeBe pre-main-sequence stars in our own galaxy. Continued observations of these very young stars from another galaxy, which are probably at the pre-hydrogen-burning stage, should provide important clues about early stages of star formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beaulieu -- Lamers -- Grison -- Julien -- Lanciaux -- Ferlet -- Vidal-Madjar -- Bertin -- Maurice -- Prevot -- Gry -- Guibert -- Moreau -- Tajhmady -- Aubourg -- Bareyre -- de Kat J -- Gros -- Laurent -- Lachieze-Rey -- Lesquoy -- Magneville -- Milsztajn -- Moscoso -- Queinnec -- Renault -- Rich -- Spiro -- Vigroux -- Zylberajch -- Ansari -- Cavalier -- Moniez -- New York, N.Y. -- Science. 1996 May 17;272(5264):995-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The EROS (Experience de Recherche d'Objets Sombres) collaboration: J. P. Beaulieu, P. Grison, R. Julien, C. Lanciaux, R. Ferlet, A. Vidal-Madjar, Institut d'Astrophysique de Paris, 98bis Boulevard, Arago, 75014 Paris, France. H. J. G. L. M. Lamers, Astronomical Institute, Princetonplein 5, NL-3584 CC Utrecht, Netherlands, and SRON Laboratory for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands. E. Bertin, Institut d'Astrophysique de Paris, 98bis Boulevard, Arago, 75014 Paris, France, and ESO La Silla, casilla 19001, Santiago 19, Chile. E. Maurice and L. Prevot, Observatoire de Marseille, 2 place Le Verrier, 13248 Marseille 04, France. C. Gry, Laboratoire d'Astronomie Spatiale CNRS, Traversee du siphon, les trois lucs, 13120 Marseille, France. J. Guibert, O. Moreau, F. Tajhmady, Centre d'Analyse des Images de l'Institut National des Sciences de l'Univers, CNRS Observatoire de Paris, 61 Avenue de l'Observatoire, 75014 Paris, France. E. Aubourg, P. Bareyre, J. de Kat, M. Gros, B. Laurent, M. Lachieze-Rey, E. Lesquoy, C. Magneville, A. Milsztajn, L. Moscoso, F. Queinnec, C. Renault, J. Rich, M. Spiro, L. Vigroux, S. Zylberajch, CEA, DSM/DAPNIA, Centre d'etudes de Saclay, 91191 Gif-sur-Yvette, France. R. Ansari, F. Cavalier, M. Moniez, Laboratoire de l'Accelerateur Lineaire IN2P3, Centre d'Orsay, 91405 Orsay, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662586" target="_blank"〉PubMed〈/a〉
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  • 10
    Publication Date: 1996-08-16
    Description: Small synthetic molecules termed growth hormone secretagogues (GHSs) act on the pituitary gland and the hypothalamus to stimulate and amplify pulsatile growth hormone (GH) release. A heterotrimeric GTP-binding protein (G protein)-coupled receptor (GPC-R) of the pituitary and arcuate ventro-medial and infundibular hypothalamus of swine and humans was cloned and was shown to be the target of the GHSs. On the basis of its pharmacological and molecular characterization, this GPC-R defines a neuroendocrine pathway for the control of pulsatile GH release and supports the notion that the GHSs mimic an undiscovered hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Howard, A D -- Feighner, S D -- Cully, D F -- Arena, J P -- Liberator, P A -- Rosenblum, C I -- Hamelin, M -- Hreniuk, D L -- Palyha, O C -- Anderson, J -- Paress, P S -- Diaz, C -- Chou, M -- Liu, K K -- McKee, K K -- Pong, S S -- Chaung, L Y -- Elbrecht, A -- Dashkevicz, M -- Heavens, R -- Rigby, M -- Sirinathsinghji, D J -- Dean, D C -- Melillo, D G -- Patchett, A A -- Nargund, R -- Griffin, P R -- DeMartino, J A -- Gupta, S K -- Schaeffer, J M -- Smith, R G -- Van der Ploeg, L H -- New York, N.Y. -- Science. 1996 Aug 16;273(5277):974-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Merck Research Laboratories, Rahway, NJ 07065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8688086" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; Codon ; DNA, Complementary/genetics ; GTP-Binding Proteins/metabolism ; Growth Hormone/*secretion ; Hormones/*metabolism ; Humans ; Hypothalamus, Middle/chemistry ; Indoles/*metabolism/pharmacology ; Macaca mulatta ; Molecular Sequence Data ; Oligopeptides/*metabolism ; Pituitary Gland/chemistry ; RNA, Complementary/genetics ; Rats ; Receptors, Cell Surface/analysis/chemistry/genetics/*metabolism ; *Receptors, G-Protein-Coupled ; Receptors, Ghrelin ; Spiro Compounds/*metabolism/pharmacology ; Swine
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