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草业科学  2014 

植物染色质免疫共沉淀方法

, PP. 659-667

Keywords: 染色质结构,提细胞核,超声波破碎,染色体免疫共沉淀

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Abstract:

?染色质结构的动态变化和基因的适时适量表达,在植物生长发育过程中起着非常重要的作用。研究染色质结合蛋白和DNA的时空结合关系,对认识这些复杂的生命过程有重大意义。染色质免疫共沉淀(ChromatinImmunoprecipitation)就是在体内染色质环境下研究蛋白质和DNA结合关系的方法,本研究利用先提核再甲醛交联的方法,详细叙述了该方法的6个主要步骤。通过对拟南芥(Arabidopsisthaliana)野生型Col-0和突变体met1中组蛋白H3K9甲基化在At4g03870转座子上差异的研究,认为染色质免疫共沉淀方法可行、稳定,此方法不仅适用于单个基因与蛋白结合关系的研究,还适用于特异蛋白结合位点的全基因组学研究。

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