Figure 9. Enzymatic activity assays of wild-type SiaM and its mutants.
The assays were performed with the substrate mimic β-keto-butanoyl-SNAC. The product and substrate were separated with HPLC and monitored at UV 240 nm. (a) Assays with mutants at F123. (b) Assays with mutants at Y111. (c) Assays with mutants at F227. (d) Assays with mutants at Y235.