three different types of beta-lactamases -- tem-2 type penicillinase , a typical cephalosporinase of citrobacter freundii , and a proteus vulgaris cephalosporinase with broad substrate range -- were studied to determine the inactivation and reactivation kinetics for beta-lactamase inhibitors of these enzymes .
C0597979
beta-lactamases
C0728805
cephalosporinase