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  • Life and Medical Sciences  (162)
  • Aerospace Medicine  (70)
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  • 2000-2004  (52)
  • 1995-1999  (237)
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  • 1995  (237)
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  • 2000-2004  (52)
  • 1995-1999  (237)
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  • 11
    Electronic Resource
    Electronic Resource
    Galactosyl receptor in human testis and sperm is antigenically related to the minor C-type (Ca2+-dependent) lectin variant of human and rat liver (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 40 (1995), S. 460-466 
    Details
    ISSN: 1040-452X
    Keywords: Spermatogenesis ; Sperm-zona pellucida binding ; Transmembrane animal lectin proteins ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Galactosyl receptor, a cell surface Ca2+-dependent lectin with binding affinity for galactose, was evaluated by immunoblotting, immunoprecipitation, Northern blotting, and immunocytochemistry in human liver, testis, and sperm. Polyclonal antisera raised against the minor asialoglycoprotein receptor variant of rat hepatocytes (designated rat hepatic lectin-2/3, RHL-2/3), and its human liver-equivalent (designated H2), recognize native galactosyl receptor in the testis and sperm in immunoblotting, immunoprecipitation, and immunocytochemical experiments. An equivalent to the major hepatocyte asialoglycoprotein receptor variant (rat RHL-1 and human H1) was not detected. Human testis and sperm galactosyl receptor was resolved, after immunoprecipitation and immunoblotting, as a single protein component of molecular mass 50 kD. The single protein component in human testis and sperm contrasted with the doublet nature of rat testis and sperm galactosyl receptor, consisting of two components of molecular masses of 54 and 49 kD. Northern blotting experiments using radiolabeled H1 and H2 cDNA probes confirmed the presence of H2 mRNA and the lack of H1 mRNA in the human testis. Immunocytochemical studies detected specific antigenic sites on the entire surfaces of spermatogenic cells. However, immunoreactivity in epididymal and ejaculated sperm was confined to head surfaces overlying the acrosome. Results from these studies, and from previous studies in the rat, suggest that the testis/sperm galactosyl receptor is a C-type Ca2+-dependent lectin with possible roles in cell-cell interaction during spermatogenesis and sperm-zona pellucida binding at fertilization. © 1995 Wiley-Liss, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080400410
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  • 12
    Electronic Resource
    Electronic Resource
    Transmission-ratio distortion of X chromosomes among male offspring of females with skewed X-inactivation (1995)
    Chichester [u.a.] : Wiley-Blackwell
    Developmental Genetics 17 (1995), S. 198-205 
    Details
    ISSN: 0192-253X
    Keywords: X-chromosome inactivation ; imprinting ; retinoblastoma ; transmission-ratio distortion ; methylation ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have begun a search for heritable variation in X-chromosome inactivation pattern in normal females to determine whether there is a genetic effect on the imprinting of X-chromosome inactivation in humans. We have performed a quantitative analysis of X-chromosome inactivation in lymphocytes from mothers in normal, three-generation families. Eight mothers and 12 grandmothers exhibited evidence of highly skewed patterns of X-chromosome inactivation. We observed that the male offspring of females with skewed X-inactivation patterns were three times more likely to inherit alleles at loci that were located on the inactive X chromosome (Xi) than the active X chromosome (Xa). The region of the X chromosome for which this phenomenon was observed extends from XP11 to -Xq22. We have also examined X-chromosome inactivation patterns in 21 unaffected mothers of male bilateral sporadic retinoblastoma patients. Six of these mothers had skewed patterns of X-chromosome inactivation. In contrast to the tendency for male offspring of skewed mothers from nondisease families to inherit alleles from the inactive X chromosome, five of the six affected males inherited the androgen receptor alleles from the active X chromosome of their mother. © 1995 Wiley-Liss, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/dvg.1020170304
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  • 13
    Electronic Resource
    Electronic Resource
    Histone H4 proximal promoter mediates a complex transcriptional response during differentiation of 3T3L1 adipocytes (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 163 (1995), S. 312-320 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: We have investigated the promoter element(s) required by the cell cycle regulated FO108 human histone H4 gene for control of gene expression during adipocyte proliferation and differentiation. Stable 3T3L1 cell lines were established that express fusion genes in which the histone H4 promoter is joined to chloramphenicol acetyltransferase (cat) as a reporter gene. Expression of the H4CAT fusion genes was monitored in proliferating and confluent 3T3L1 preadipocytes and in differentiating 3T3L1 adipocytes. The results indicate that the H4 cell cycle element (CCE), which mediates S phase-specific stimulation of H4 gene transcription, is not required for transcriptional regulation during differentiation. Instead, a minimal H4 promoter (nucleotides -46 to -11) is sufficient to mediate the complex transcriptional response of H4 gene expression observed during the process of adipocyte differentiation of 3T3L1 cells. In addition, the data suggest that down-regulation of histone gene expression during cellular differentiation may be mediated by passive inactivation of the promoter due to loss of positive regulatory factor(s). © 1995 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041630212
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  • 14
    Electronic Resource
    Electronic Resource
    Recovery of gene function by gene duplication in Saccharomyces cerevisiae (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 11 (1995), S. 169-177 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome ; ATCase ; URA2 ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A prototroph revertant (Rev9) selected from an ATCase- mutant of the URA2 gene containing three nonsense mutations was shown to contain two ATCase coding sequences. We cloned both ATCase coding areas to show that the duplicated locus (dl9) was the only functional one. Its size corresponded roughly to the second half of the URA2 wild-type gene. Sequence analysis of the 5′ end of dl9 indicated that this duplicated sequence was inserted within the intergenic region close to the MRS3 gene and was transcribed from an unknown promoter divergently from the MRS3 gene. The event leading to the revertant strain Rev9 included a rearrangement that increased the size of chromosome X by about 60 kb. In agreement with such a rearrangement, recombination was undetectable in the vicinity of the locus dl9. Genetic mapping confirms that the MRS3 gene is 2 cM distal to the URA2 gene on the right arm of chromosome X.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320110208
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  • 15
    Electronic Resource
    Electronic Resource
    Sequence of a 9·8 kb segment of yeast chromosome II including the three genes of the MAL3 locus and three unidentified open reading frames (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 11 (1995), S. 667-672 
    Details
    ISSN: 0749-503X
    Keywords: chromosome II ; S288C ; MAL3 ; MAL1 ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We report the DNA sequence of a segment located on the right arm of chromosome II from Saccharomyces cerevisiae S288C near the subtelomeric sequences. The sequence was determined using a random cloning strategy followed by an oligonucleotide-directed sequencing. The segment contains four non-overlapping open reading frames (ORFs) YBR297w, YBR298c, YBR299w and YBR301c, and two overlapping ones (YBR300c and YBR300w). Three of them - YBR297w, YBR298c and YBR299w - are the MAL3R (transcriptional regulatory protein), MAL3T (maltose permease) and MAL3S (maltase) genes of the MAL3 locus previously localized. The three other ORFs are unidentified. Another MAL locus (MAL1) has been localized on chromosome VII. The Mal- phenotype of strain S288c cannot be explained by telomeric silencing. The sequences have been submitted to the EMBL data library under Accession Numbers Z36166; Z36167; Z36168; Z36169 and Z36171.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320110707
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  • 16
    Electronic Resource
    Electronic Resource
    Melatonin and puberty in female lambs exposed to EMF: A replicate study (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Bioelectromagnetics 16 (1995), S. 119-123 
    Details
    ISSN: 0197-8462
    Keywords: EMF ; melatonin ; puberty ; sheep ; transmission line ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Physics
    Notes: In an earlier study, we found no effects of 60 Hz electric and magnetic fields (EMF) from a 500 kV transmission line on serum melatonin patterns or on puberty in ten female Suffolk lambs (Ovis aries). We conducted a larger replicate study of 15 lambs exposed to a mean electric field of 6.3 kV/m and a mean magnetic field of 3.77 μT and 15 controls exposed to EMF two orders of magnitude weaker than in the line area. The replicate produced essentially the same results as our previous study. © 1995 Wiley-Liss, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bem.2250160208
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  • 17
    Electronic Resource
    Electronic Resource
    Developmental progression of Gpd expression from the inactive X chromosome of the virginia opossum (1995)
    Chichester [u.a.] : Wiley-Blackwell
    Developmental Genetics 16 (1995), S. 367-374 
    Details
    ISSN: 0192-253X
    Keywords: X-chromosome inactivation ; Gpd expression ; marsupial ; development ; opossum ; triplaid ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Metatherian (marsupial) mammals possess a non-random form of X-chromosome inactivation in which the paternally-derived X is always the one inactivated. To examine the progression of X-linked gene expression during metatherian development, we compared relative levels of the maternally and paternally encoded Gpd gene products in heterozygous female Virginia opossums (Didelphis virginiana) across a moior portion of the developmental period. Panels of tissues obtained from fetuses, newborns, and pouch young were examined via polyacrylamide gel electrophoresis of the G6PD protein. As in adults, G6PD phenotypes in these developmental stages were highly skewed in favor of the maternal allele product, but in some tissues there was a marked increase in paternal allele expression with advancing developmental age. However, even by 42 days of post-partum development, expression of the paternal Gpd allele had not attained the adult, tissue-specific activity pattern. Our findings indicate remarkable developmental changes in the activity of the paternal allele in several tissues/organs continuing well into mid pouch-life stages and beyond. Specifically we found that 1) a substantially repressed paternal Gpdgene is present in the cells of female stage 29 fetuses and later developmental stages, 2) the activity state of the paternal Gpd gene is not fixed during early embryonic development in this species, 3) maior changes in paternal Gpd expression occur in advanced developmental stages and comprise a maturation of the gene expression pattern during ontogeny, and 4) alterations of paternal Gpd allele activity during development occur in a tissue-specific manner. © 1995 Wiley-Liss, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/dvg.1020160410
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  • 18
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    Participation of the human beta-globin locus control region in initiation of DNA replication (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-03
    Description: The human beta-globin locus control region (LCR) controls the transcription, chromatin structure, and replication timing of the entire locus. DNA replication was found to initiate in a transcription-independent manner within a region located 50 kilobases downstream of the LCR in human, mouse, and chicken cells containing the entire human beta-globin locus. However, DNA replication did not initiate within a deletion mutant locus lacking the sequences that encompass the LCR. This mutant locus replicated in the 3' to 5' direction. Thus, interactions between distantly separated sequences can be required for replication initiation, and factors mediating this interaction appear to be conserved in evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aladjem, M I -- Groudine, M -- Brody, L L -- Dieken, E S -- Fournier, R E -- Wahl, G M -- Epner, E M -- New York, N.Y. -- Science. 1995 Nov 3;270(5237):815-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gene Expression Laboratory, Salk Institute, San Diego, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481774" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Evolution ; Cell Line ; Chickens ; *DNA Replication ; Globins/*genetics ; Humans ; Hybrid Cells ; Mice ; Molecular Sequence Data ; *Regulatory Sequences, Nucleic Acid ; Sequence Deletion ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 19
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    Structure of the Arabidopsis RPM1 gene enabling dual specificity disease resistance (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-08-11
    Description: Plants can recognize pathogens through the action of disease resistance (R) genes, which confer resistance to pathogens expressing unique corresponding avirulence (avr) genes. The molecular basis of this gene-for-gene specificity is unknown. The Arabidopsis thaliana RPM1 gene enables dual specificity to pathogens expressing either of two unrelated Pseudomonas syringae avr genes. Despite this function, RPM1 encodes a protein sharing molecular features with recently described single-specificity R genes. Surprisingly, RPM1 is lacking from naturally occurring, disease-susceptible Arabidopsis accessions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grant, M R -- Godiard, L -- Straube, E -- Ashfield, T -- Lewald, J -- Sattler, A -- Innes, R W -- Dangl, J L -- R29 GM 46451/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1995 Aug 11;269(5225):843-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Delbruck Laboratory, Koln, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7638602" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/*genetics/microbiology ; *Arabidopsis Proteins ; Base Sequence ; Genes, Bacterial ; *Genes, Plant ; Genetic Complementation Test ; Molecular Sequence Data ; Mutation ; Open Reading Frames ; Plant Diseases/*genetics ; Plant Proteins/chemistry/*genetics ; Plants, Genetically Modified ; Polymorphism, Restriction Fragment Length ; Pseudomonas/genetics/growth & development/pathogenicity ; Transformation, Genetic ; Virulence/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 20
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    Mutations in the dystrophin-associated protein gamma-sarcoglycan in chromosome 13 muscular dystrophy (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-03
    Description: Severe childhood autosomal recessive muscular dystrophy (SCARMD) is a progressive muscle-wasting disorder common in North Africa that segregates with microsatellite markers at chromosome 13q12. Here, it is shown that a mutation in the gene encoding the 35-kilodalton dystrophin-associated glycoprotein, gamma-sarcoglycan, is likely to be the primary genetic defect in this disorder. The human gamma-sarcoglycan gene was mapped to chromosome 13q12, and deletions that alter its reading frame were identified in three families and one of four sporadic cases of SCARMD. These mutations not only affect gamma-sarcoglycan but also disrupt the integrity of the entire sarcoglycan complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noguchi, S -- McNally, E M -- Ben Othmane, K -- Hagiwara, Y -- Mizuno, Y -- Yoshida, M -- Yamamoto, H -- Bonnemann, C G -- Gussoni, E -- Denton, P H -- Kyriakides, T -- Middleton, L -- Hentati, F -- Ben Hamida, M -- Nonaka, I -- Vance, J M -- Kunkel, L M -- Ozawa, E -- NS23740/NS/NINDS NIH HHS/ -- P01-NS26630/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1995 Nov 3;270(5237):819-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Neuroscience, National Center for Neurology and Psychiatry, Tokyo, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481775" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Chromosome Mapping ; *Chromosomes, Human, Pair 13 ; *Cytoskeletal Proteins ; DNA, Complementary/genetics ; Dystrophin/chemistry/genetics/metabolism ; Humans ; Linkage Disequilibrium ; Membrane Glycoproteins/chemistry/*genetics/metabolism ; Molecular Sequence Data ; Molecular Weight ; Muscle, Skeletal/chemistry/metabolism ; Muscular Dystrophies/*genetics ; Mutation ; Phenotype ; Rabbits ; Sarcoglycans ; Sequence Deletion
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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