based on the product analysis of reducing end-labeled g3 in addition to the above findings , the following conversion mechanism is proposed : streptomyces alpha-amylase catalyzes transglycosylation to produce maltotetraose ( g4 ) as a transient product which is immediately degraded into two molecules of g2 by a subsequent hydrolytic reaction , i.e. , two molecules of g3 are converted into three molecules of maltose without appreciable formation of glucose .
C0002245
alpha-amylase
C0020291
hydrolytic