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Plus reactions worked differently: they used T4 DNA polymerase, an enzyme with strong 3’ to 5’ exonuclease activity, meaning it can chew back the end of a DNA strand. In the presence of only one dNTP, T4 DNA polymerase would degrade each fragment from its 3’ end until it reached a nucleotide complementary to that dNTP, at which point the exonuclease activity would be inhibited. This ensured that all fragments in a given plus reaction ended with the same nucleotide.，详情可参考WPS官方版本下载
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张学武：建议农村养老基金要设定7%的基金目标收益线，收益率低于目标时由中央财政托底补足3%的最低收益，高于目标时提取20%建立风险准备金；由全国社保基金理事会实行市场化运营。。体育直播是该领域的重要参考