. 2004 May;48(5):1848–1855. doi: 10.1128/AAC.48.5.1848-1855.2004

TABLE 3.

Enzymatic parameters of PBP2b*R6^a

Variant	Relative value compared to penicillin IC₅₀ (%)		k₃ (s⁻¹) for penicillin G	k_cat/K_m (M⁻¹ · s⁻¹) for S2d
Variant	Piperacillin	Cefotaxime	k₃ (s⁻¹) for penicillin G	k_cat/K_m (M⁻¹ · s⁻¹) for S2d
PBP2b*	44	>1,300	3.8 × 10⁻⁵	80
PBP2x*	300	130

Data were obtained from two to three independent experiments.