a-D-galactosidase ( a-Gal, R. C. 3. 2. 1. 22 ) i s an exo-glycosidaso, widely present in the bio-resources. The enzyme isolated from coffee beans has been well characterized and it has high activity in hydrolyzing the terminal a -Gal residues from glycoconjugates on human blood group B erythrocytes to demonstrate group 0 serotype. a -Gal from coffee bean has been successf u 11 y used i n the serologicl conversion of red blood cells in clinical studies of blood transfusion. The molecular weight of...