1 β-galactosidase β-galactosidase, also called beta-gal or β-gal, is a hydrolase enzyme that catalyzes the hydrolysis of β-galactosides into monosaccharides. Substrates of different β- galactosidases include ganglioside GM1, lactosylceramides, lactose, and various glycoproteins. β-galactosidase
2