Summary: 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. https://www.creative-enzymes.com/product/Native-Kluyveromyces-Lactis-Galactosidase_928.html