Isopropyl β-D-1-thiogalactopyranoside (IPTG) is used along with X-gal for blue-white screening. IPTG is a non-metabolizable analog of galactose that induces the expression of lacZ gene. It should be noted that IPTG is not a substrate for β-galactosidase but only an inducer. See more Blue-white screening is a rapid and efficient technique for the identification of recombinant bacteria. It relies on the activity of β-galactosidase, an enzyme occurring … See more The presence of lactose in the surrounding environment triggers the lacZ operon in E. coli. The operon activity results in the production of β-galactoisdase enzyme … See more For screening the clones containing recombinant DNA, a chromogenic substrate known as X-gal is added to the agar plate. If β-galactosidase is produced, X-gal is … See more Web异丙基硫代-Β-d-半乳糖苷(iptg) 异丙基-beta-d-硫代半乳糖吡喃糖苷 异丙基-Β-d-硫代半乳糖苷(简称iptg) 1-甲基乙基-β-d-1-硫代半乳糖吡喃糖苷 异丙基-beta-d-硫代乳吡喃糖苷(iptg) 异丙基 Β-d-1-硫代半乳糖吡喃糖苷 iptg isopropyl 尾-d-thiogalactopyranoside: 英文别名 …
为什么要推广异丙基硫代半乳糖苷,IPTG有哪些优点?
WebFor LB/ X-Gal indicator plates, add X-Gal (5-bromo-4-chloro-3-indolyl-β-d-galactopyranoside) to 40 μg/mL. IPTG may also be included in these plates (at 0.5 mM) to improve protein … Webabsence of any spectinomycin resistance markers. ... Untransformed cells must exhibit growth of white colonies on LB plates containing 400 μg/ml X-Gal and 1 mM IPTG, indicating a Lac phenotype. Gal Phenotype Cells must exhibit growth of bright red colonies on MacConkey galactose plates, indicating a Galphenotype. ... good things to do today
Blue/White Screening of Bacterial Colonies X-Gal/IPTG Plates
WebOur X-Gal and IPTG products are intended to be used together for blue-white colony screening. X-Gal (5-Bromo-4-Chloro-3-Indolyl-beta-D-Galactoside) is a chromogenic … Web(Yes/No) Color of Colonies (If Growth) Table 4. Bacterial plate cultures. Plate Plate Additives А IPTG, X-gal, spectinomycin yes no B IPTG, X-gal, spectinorriyoin blue n/a blue white С IPTG, X-gal, spectinomycin yes yes D IPTG. X-gal, … WebApr 3, 2024 · IPTG 常用于需要 诱导 beta-半乳糖苷酶活性的克隆实验。 它常与 X-Gal 或 Bluo-Gal 结合使用,用于重组细菌菌落的蓝白筛选,这些菌落可以诱导 lac 操纵子在大肠杆菌中的表达。 IPTG 与 lacI 阻遏蛋白结合并改变其构象而发挥作用,防止 β-半乳糖苷酶编码 基因 … chevron merger history