摘要:将从普通烟草(Nicotiana tobaccum)‘K326’中克隆得到的转录因子基因NtDREB2,采用PCR去除NtDREB2基因的终止密码子,酶切后构建入PDI/pET28a融合表达载体。取测序正确的重组质粒转化大肠杆菌BL21(DE3),经IPTG诱导,SDS-PAGE检测表达后,用Ni-NTA纯化融合蛋白,获得了高效表达的可溶性目的蛋白。凝胶滞留(EMSA,electrophoresis mobility shift assay)实验表明融合蛋白具有结合DRE(dehydration—responsive element)元件的能力。
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