5-Bromo-4-Chloro-3-Indolyl-β-D-Galactopyranoside

(X-Gal)

Inalco Code:	1758-0300
C.A.S.R.N.:	7240-90-6
Applications:	Substrate for β-Galactosidase that is converted, by the enzyme, into an intense indigo-blue chromophore (615 nm). It has various applications. It is used in bacterial detection systems; in gene fusion studies where β-Galactosidase is the marker, or to identify natural lac gene carrying bacteria (e.g. general coliforms). It is also used in histochemistry.
Formula:	C₁₄H₁₅BrClNO₆