学科分类
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1 个结果
  • 简介:Nanogproteinisexpressedintheinteriorcellsofcompactedmorulaeandmaintainedtillepiblastsbutdownregulatedbyimplantationstage.Itisalsoexpressedinembryonicstemcells,embryoniccarcinomacellsandembryonicgermcellsbutdisappearedindifferentiatedEScells.Inthisstudy,wehaveisolated,sequenced,andperformedthefirstcharacterizationoftheNanogpromoter.Thetranscriptionstartsitesweremappedbyprimerextensionanalysis.TwopromoterregionswerefoundupstreamthetranscriptionstartsitesandtheexpressionofmajorNanogpromoter/reportergeneconstructisabolishedindifferentiatedF9ECcellsascomparedtotheundifferentiatedcounterpart.Wealsoshowedthataputativeoctamermotif(ATGCAAAA)isnecessaryforthemajorpromoteractivity.GelshiftandsupershiftassaysshowedthatOct-1,Oct-4andOct-6proteinselectivelybindtotheoctamermotif.

  • 标签: 鼠科动物 NANOG基因 启动子 分离 F9 EC细胞