X-Gal (5-bromo-4-chloro-3-indolyl-β-D-galactopyranoside) is a widely-used chromogenic substrate for β-galactosidase that produces dark blue color after enzymatic reaction. A technique called blue-white screening employs X-GAL as an indicator of ß-glactosidase enzyme (encoded by the lacZ gene) expression.
Catalog Number: ZXB-02-100
CAS Number: 7240-90-6
Synonyms: 5-Bromo-4-chloro-3-indolyl beta-D-Galactopyranoside
Molecular Weight: 408.63
PubChem Chemical ID: 65181
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