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81.
An evaluation of HapMap sample size and tagging SNP performance in large-scale empirical and simulated data sets 总被引:7,自引:0,他引:7
Zeggini E Rayner W Morris AP Hattersley AT Walker M Hitman GA Deloukas P Cardon LR McCarthy MI 《Nature genetics》2005,37(12):1320-1322
A substantial investment has been made in the generation of large public resources designed to enable the identification of tag SNP sets, but data establishing the adequacy of the sample sizes used are limited. Using large-scale empirical and simulated data sets, we found that the sample sizes used in the HapMap project are sufficient to capture common variation, but that performance declines substantially for variants with minor allele frequencies of <5%. 相似文献
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Immunoglobulin Cmu RNA in T lymphoma cells is not translated 总被引:4,自引:0,他引:4
It is widely believed that immunoglobulin genes might encode at least part of the receptor for antigen on the T lymphocyte. Evidence supporting this comes from the effects of anti-immunoglobulin idiotype antibodies on cellular immune networks and from the presence of idiotypes on immunologically active factors from T cells. Detailed molecular characterization of the receptors, however, has been seriously hampered by the lack of a suitable cellular source from which it might be isolated. The recent demonstration of Kemp et al. that thymocytes and certain cultured lines of mouse T lymphoma cells contain polyadenylated RNA molecules encoded by the immunoglobulin Cmu gene (Cmu RNA) prompted us to identify the corresponding protein molecules in those cells. As the haploid mouse genome contains a single Cmu gene, any polypeptide encoded by this gene should react with at least some of the antibodies present in rabbit anti-mouse IgM antiserum. In this letter we report that a number of T lymphoma lines, regardless of whether they contain Cmu RNA, synthesize no detectable mu polypeptides. 相似文献
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S. E. Judge G. A. Kerkut R. J. Walker 《Cellular and molecular life sciences : CMLS》1976,32(5):596-597
Summary An interneurone, making excitatory synaptic connections with a second neurone has been identified in the brain ofHelix pomatia. The results suggest that the connection is monosynaptic.We thank the M.R.C. for a Training Grant to S.E.J. 相似文献
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