Enzyme substrates for galactosidases, a member of the glycosidase family of hydrolyases. Galalctosidases catalyze the hydrolysis of galactosides into monosccharides.
5-Bromo-4-chloro-3-indolyl β-D-galactopyranoside is most commonly known as X-Gal. X-gal is a histochemical substrate for β-galactosidase which cleaves X-Gal to yield an insoluble blue precipitate.
X-Gal is a mainstay in molecular biology cloning applications in which it is u..