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- 介绍: IPTG是β–半乳糖苷酶的活性诱导物质。基于这个特性,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。 易溶于水、甲醇、乙醇,可溶于丙酮、氯仿,不溶于乙醚。是β-半乳糖苷酶和β-半乳糖透酶的诱导剂,不被β-半乳糖苷水解,是硫代半乳糖转酰酶的底物 溶液配制: 将 IPTG 溶于水,然后经无菌过滤,配制成储存液 (0·1M)。指示板中 IPTG 最终浓度应为 0·2mM。
- 熔点: 116-126°C
- 比重: 1·37
- 储存条件: 2~8℃
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