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Overview
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Chromogenic substrate for β-D-galactosidase yielding a lapis colored precipitate. 5-Bromo-3-indoxyl-β-D-galactopyranoside can be used in conjunction with Isopropyl-β-D-thiogalacto-pyranoside as an alternative to 5-bromo-4-chloro-3-indolyl β-D-galactopyranoside (X-gal), producing a darker blue color for detection of β-galactosidase activity in bacterial colonies in a colorimetric assay to detect recombinants (white) from non-recombinants (blue). 5-Bromo-3-indoxyl-β-D-galactopyranoside is also used in histochemistry to demonstrate β-galactosidase activity in tissues.
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Overview