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Träfflista för sökning "WFRF:(Wilson David) srt2:(2000-2004)"

Sökning: WFRF:(Wilson David) > (2000-2004)

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1.
  • Hillier, Ladeana W, et al. (författare)
  • Sequence and comparative analysis of the chicken genome provide unique perspectives on vertebrate evolution
  • 2004
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 432:7018, s. 695-716
  • Tidskriftsartikel (refereegranskat)abstract
    • We present here a draft genome sequence of the red jungle fowl, Gallus gallus. Because the chicken is a modern descendant of the dinosaurs and the first non-mammalian amniote to have its genome sequenced, the draft sequence of its genome--composed of approximately one billion base pairs of sequence and an estimated 20,000-23,000 genes--provides a new perspective on vertebrate genome evolution, while also improving the annotation of mammalian genomes. For example, the evolutionary distance between chicken and human provides high specificity in detecting functional elements, both non-coding and coding. Notably, many conserved non-coding sequences are far from genes and cannot be assigned to defined functional classes. In coding regions the evolutionary dynamics of protein domains and orthologous groups illustrate processes that distinguish the lineages leading to birds and mammals. The distinctive properties of avian microchromosomes, together with the inferred patterns of conserved synteny, provide additional insights into vertebrate chromosome architecture.
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  • McLaughlin, David, et al. (författare)
  • Specific modification of heparan sulphate is required for normal cerebral cortical development
  • 2003
  • Ingår i: Mechanisms of Development. - : Elsevier. - 0925-4773 .- 1872-6356. ; 120:12, s. 1481-1488
  • Tidskriftsartikel (refereegranskat)abstract
    • Proteoglycans are cell surface and extracellular matrix molecules to which long, unbranched glycosaminoglycan side chains are attached. Heparan sulphate, a type of glycosaminoglycan chain, has been proposed as a co-factor necessary for signalling by a range of growth factors. Here we provide evidence that loss of 2-O-sulphation in heparan sulphate leads to a significant reduction in cell proliferation in the developing cerebral cortex. The gene encoding heparan sulphate 2-sulphotransferase (Hs2st) is expressed in embryonic cortex and histological analysis of mice homozygous for a null mutation in Hs2st indicated a reduction in the thickness of the embryonic cerebral cortex. Using 5′-bromodeoxyuridine (BrdU) incorporation assays we found a reduction of approximately 40% in labelling indices of cortical precursor cells at E12. Comparison of the fates of cortical cells born on E13 and E15 in Hs2st−/− mutant and wildtype littermate embryos revealed no differences in the pattern of cell migration. Our findings suggest a critical role for 2-O-sulphation of heparan sulphate proteoglycan (HSPG) in regulating cell proliferation during development of the cerebral cortex, perhaps through the modulation of cellular responses to growth factor signalling.
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