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\ p None B a = c @ = Z ?N*8 X" 1 Arial1 Arial1 Arial1 Arial1 Arial1 Arial1 Arial General ` Table_1 8I A Substrate Concn range (M) Enzyme (M)% Km (µM)4 Vmax(µMs-1)4 kcat (s−1)c kcat/Km (µM−1s−1) Penicillins Benzylpenicillin 1 0 0 2 , 0 0 0 0 . 5 1 . 5 131 8.350.79 16.7 1.28
Ampicillin 2 0 0 2 , 0 0 0 181 5.70.44 11.4 0.63 Cephalosporins
Cefuroxime 2 0 2 0 0 121 1.30.11 2.6 0.22 Ceftazidime 1 0 1 5 0 1299 1.80.08 3.6 0.03 Ceftizoxime 2 0 2 5 0 292 1.50.09 3.0 0.10 Cefpiramide 1 0 2 0 0 393 0.70.05 1.4 0.04 Carbapenems Imipenem 2 0 1 , 0 0 0 0 . 2 1 . 5 12711 5.40.35 10.8 0.09 Meropenem 1 0 3 0 0 686 2.00.15 4.0 0.06
Monobactam Aztreonam 5 0 0 1 , 5 0 0 x ND a ND
d MbP?_ % * + &P &F