Figure 2From: Enzymatic analysis of the effect of naturally occurring Leu138Pro mutation identified in SHV β-lactamase on hydrolysis of penicillin and ampicillinStructure of the wild-type (A) and L138P β-lactamases (B). The red and blue residues indicate the catalytic residues (S70-K73-S130-E166) and mutation site (L138P), respectively.Back to article page