产品简介：
Tuner strains are lacZY deletion mutants of BL21 and enable adjustable levels of protein expression throughout all cells in a culture. The lac permease (lacY) mutation allows uniform entry of IPTG into all cells in the population, which produces a concentration-dependent, homogeneous level of induction. By adjusting the concentration of IPTG, expression can be regulated from very low levels up to the robust, fully induced levels commonly associated with pET vectors. Lower-level expression may enhance the solubility and activity of difficult target proteins. DE3 indicates that the host is a lysogen of λDE3, and therefore carries a chromosomal copy of the T7 RNA polymerase gene under control of the lacUV5 promoter. Such strains are suitable for production of protein from target genes cloned in pET vectors by induction with IPTG.

 

产品参数：
出品公司：Novagen
抗性：无
载体类型：原核表达载体
基因型：
菌株类型：E.coli
培养条件：37℃，有氧，LB
质粒转化：42℃热激
诱导方式：IPTG
保存方式：20%甘油，-20℃

 

注意事项：
1、为了您的安全和健康，请穿实验服并戴一次性手套操作。本产品仅限于专业人员的科学研究用，不得用于临床诊断或治疗等其他用途。
2、使用甘油菌可不完全融解，在菌液表面蘸取少量涂布固体琼脂平板即可。完全融解后使用，菌体会逐渐沉淀至管底，请混匀后使用。随着冻融次数的增加，菌株的活力会逐渐下降。