Abstract
Homogenates of small intestinal mucosa from adult pigs have β-glucosidase (cellobiase, gentiobiase and phenyl-β- d-glucopyranosidase) and β-galactosidase (lactase) activities, located in the microsomes, which can be solubilized by trypsin digestion. Optimum pH and K 8 values have been determined, except for the cellobiase activity, which did not follow the Michaelis-Menten relationship. The ß-glucosidase and ß-galactosidase activities have identical chromatographic and heat inactivation properties and are possibly caused by one enzyme. Their parallel anatomic distribution in the intestinal mucosa of both adult and new-born pigs supports this hypothesis.
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