5-Bromo-4-chloro-3-indolyl β -D-galactopyranoside, commonly known as X-Gal, is a histochemical substrate for β-galactosidase.
Application
X-Gal est un substrat chromogène pour la β-galactosidase qui produit une riche couleur bleue facilement détectable visuellement par rapport au fond. X-Gal est le substrat de choix pour la sélection bleu-blanc des colonies bactériennes recombinantes avec le génotype lac+.
5-Bromo-4-chloro-3-indolyl β-D-galactopyranoside has been used in the preparation of X-Gal stock solution to add it in LB agar plates for blue-white screening of transformants.[1]
Actions biochimiques/physiologiques
X-gal is routinely used to detect transgene activity in situ.[2]
Quantité
Contains 5 mg substrate per tablet
Reconstitution
A stock solution (100 mg/ml) is prepared by dissolving X-Gal in dimethylformamide and should be stored at −20°C and protected from light. Sterilization is not required.
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