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pTXB1大肠表达质粒
基本信息
启动子: T7
复制子: M13 ori
质粒分类: 大肠杆菌载体;蛋白表达质粒
质粒大小: 6706bp
原核抗性: 氨苄青霉素Amp
克隆菌株: DH5α
培养条件: 37℃,有氧,LB
表达宿主: 大肠杆菌
培养条件: 37℃,有氧,LB
诱导方式: IPTG或乳糖及其类似物
备注: 温控表达质粒
质粒简介
pTXB1 contains a mini-intein from the Mycobacterium xenopi gyrA gene (Mxe GyrA intein; 198 amino acid residues) that has been modified to undergo thiol-induced cleavage at its N-terminus (3,5). The vector allows for the purification of a target protein without any extra amino acids by cloning into the NdeI and SapI sites. The target protein is fused at its C-terminus to a self-cleavable intein tag (~28 kDa) that contains the chitin binding domain (CBD, 6 kDa) allowing for affinity purification of the fusion precursor on a chitin column.
质粒图谱
pTXB1大肠表达质粒使用说明:
1、收到质粒干粉后请先5000rpm离心1min,再加入20μl无菌水溶解质粒,室温放置1min;
2、从-80℃冰箱中取出相应的感受态,置于冰盒上解冻,并做好标记;
3、取2μl质粒加至100μl感受态中,冰浴30min;
4、42℃热激90s,再冰浴2min;
5、加入900μl无抗的LB液体培养基,180rpm震荡培养45min;
6、6000rpm离心5min,仅留100ul上清混匀菌体沉淀;
7、混匀后的菌液加至对应抗性的LB平板上,倒入适量玻璃珠,涂匀液体;
8、将平板正向培养1h,再倒置培养12h~16h;
9、挑取单克隆菌落至对应抗性的LB液体培养基中,震荡培养12h~16h,根据实验需要提取质粒。
pTXB1大肠表达质粒注意事项:
1、如果您收到的是甘油菌种,请先四区划线,挑取单克隆培养。
2、如果第二天转化平板长的过多,请将质粒按比例稀释后再转化。