The pET-24a-d(+) vectors carry an N-terminal T7•Tag sequence plus an optional C-terminal HIS TAG® sequence. These vectors differ from pET-21a-d(+) only by their selectable marker (kanamycin vs. ampicillin resistance). Note that the sequence is numbered by the pBR322 convention, so the T7 expression region is reversed on the vector map (TB070). The f1 origin is oriented so that infection with helper phage will produce virions containing single-stranded DNA that corresponds to the coding strand. The pET Vectors are supplied as purified plasmid DNA (10 µg). Each order of pET DNA also includes an Induction Control strain (supplied as a glycerol stock). Please contact technical service if you need additional information.，官网链接：https://www.sigmaaldrich.cn/product/mm/69750m 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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