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X-Gal
X-Gal常用于β-半乳糖苷酶的原位染色检测以及蓝白斑筛选。X-Gal是β-半乳糖苷酶(β-galactosidase)的显色底物,在β-半乳糖苷酶的催化下会产生蓝色产物。基于这个特点,当pUC系列载体DNA以lacZ 缺欠细胞作为宿主进行转化时,或M13噬菌体载体DNA进行转染时,如果在培养基中加入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而方便地挑选择出基因重组体。风险提示:丁香通仅作为第三方平台,为商家信息发布提供平台空间。用户咨询产品时请注意保护个人信息及财产安全,合理判断,谨慎选购商品,商家和用户对交易行为负责。对于医疗器械类产品,请先查证核实企业经营资质和医疗器械产品注册证情况。
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文献和实验, transfect the DNA into mammalian cells, and then fix and stain a tissue with X-gal. The cells that turn blue must have the beta galactosidase enzyme, the product of the lac Z gene, which could only have been expressed from the donated promoter. Ergo
Materials Fixative 2% Paraformaldehyde (in PBS) Staining solution 5 mM potassium ferricyanide, 5 mM potassium ferrocyanide, 2 mM MgCI, 0.01% sodium deoxycholate 0.02% Nonidet P-40 (NP-40) in PBS. X-gal Stock 40 mg
Detection of -Galactosidase Activity: X-gal Staining
X-gal staining is a rapid and convenient histochemical technique used to detect reporter gene expression. A prerequisite is the creation or acquisition of transgenic reporter mouse lines, in which the bacterial LacZ gene has been knocked
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