Fig. 4

The pH (a) and thermal (b) stability profiles of ScLac. a We incubated 0.4 µM ScLac in the optimal pH buffer for 1, 6 and 24 h at 30 °C and the residual activity was measured using 20 µM DMP. b We incubated 0.4 µM ScLac at 30, 60 and 90 °C for 1 h in the optimal pH buffer and the residual activities were tested against 20 µM DMP. Control assays were set up without pH or heat treatment