Fig. 3

Relative percent of enzyme activity in different pHs and activity after 30 min incubation in 35 °C at different pHs (KCl−HCl pH 2.0, citrate–phosphate pH 4.0–6.0, Tris–HCl pH 8.0, and carbonate–bicarbonate pH 10.0) (assay is performed in 37 °C with CBZ- l-glutaminylglycine and hydroxyl amine as substrates)