β-glucosidase is a glucosidase enzyme located in on the brush border of the small intestine that acts upon β1->4 bonds linking two glucose or glucose-substituted molecules (i.e., the disaccharide cellobiose). It is one of the cellulases, enzymes involved in the decomposition of cellulose and related polysaccharides; more specifically, an exocellulase with specificity for a variety of beta-D-glycoside substRates. It catalyzes the hydrolysis of terminal non-reducing residues in beta-D-glucosides with release of glucose.http://www.creative-enzymes.com/product/Native-Thermotoga-Neopolitana-Glucosidase_1493.html