the turnover numbers for benzylpenicillin , d-ampicillin , and 6-aminopenicillanic acid were 4.2 x 10 ( 4 ) , 6.3 x 10 ( 4 ) , and 2.2 x 10 ( 4 ) moles of substrate hydrolyzed per min by 1 mole of enzyme , whereas the michaelis constants were 100 , 160 , and 440 mum , respectively .
C0030827
benzylpenicillin
C0002680
ampicillin