Purple-β-D-Gal (5-Iodo-3-indolyl-β-D-galactopyranoside) is a chromogenic substrate for β-galactosidase. Similar to X-gal, but generates a purple (λmax ~575 nm) colored precipitate on enzyme hydrolysis.
- Off-white solid soluble in water and DMSO.
- Store at -20°C and protect from light
1. Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory, B. 14, p 186 (1989).
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