chemical modification of two histidine residues of porcine pancreatic alpha-amylase ( ec 3.2.1.1 ) by diethyl pyrocarbonate in the presence of a high concentration of maltotriose caused a decrease of amylase activity and an increase of maltosidase activity ( hydrolysis of p-nitrophenyl-alpha-maltoside ) .
C0002712
amylase
C0020291
hydrolysis