intracellular distribution of three types of beta-galactosidases ( beta-d-galactoside galactohydrolase ec 3.2.1.12 ) i.e . hetero beta-galactosidase , lactase and acid beta-galactosidase , was studied by examining the properties of subcellular fractions isolated by a systematic fractionation of mucosal cells of the small intestine of the hog .
C0005220
beta-galactosidase
C0083183
lactase