Zymo Research X1001-5 X-GAL (5-bromo-4-chloro-3-indolyl ß-D-galactopyranoside), Zymo Research, 1 x 5ml/Unit - 11-729B | Genesee Scientific Zymo Research X1001-5 X-GAL (5-bromo-4-chloro-3-indolyl ß-D-galactopyranoside), Zymo Research, 1 x 5ml/Unit - 11-729B | Genesee Scientific