异丙基-β-D-硫代半乳糖苷(IPTG)是β–半乳糖苷酶的活性诱导物质,常用于蓝白斑筛选及IPTG诱导的细菌内的蛋白表达等。当pUC系列的载体DNA(或其他带有lacZ基因载体DNA)以lacZ缺失细胞为宿主进行转化时、或用M13噬菌体的载体DNA进行转染时,如果在平板培养基中加入X–Gal和IPTG,由于β–半乳糖苷酶的α–互补性,可以根据是否呈现白色菌落(或噬菌斑)而方便地挑选出基因重组体。此外,它还可以作为具有lac或tac等启动子的表达载体的表达诱导物使用。
中文名称(Chinese Synonym) | 异丙基-β-D-硫代半乳糖苷 |
英文名称(English Synonym) | Isopropyl β-D-1-thiogalactopyranoside; Isopropyl β-D-thiogalactoside; |
CAS号(CAS NO.) | 367-93-1 |
分子式(Molecular Formula) | C9H18O5S |
纯度(Purity, HPLC) | ≥99% |
外观(Appearance) | 白色粉末 |
分子量(Molecular Weight) | 238.30 g/mol |
结构式(Structure) | ![]() |
冰袋运输。粉末-20℃避光保存,有效期2年。
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