Catalytic activity of the AST IV mutants with 2-naphthol as substrate a
↵ a Enzyme units are expressed as nanomoles of 2-naphthylsufate formed per minute, following assay with 250 μM 2-naphthol at pH 5.5
↵ b The extracts were obtained from 250 ml of bacterial cell culture grown to a wet weight of 3.5 g