Fig. 7From: Enhanced extracellular raw starch-degrading α-amylase production in Bacillus subtilis by promoter engineering and translation initiation efficiency optimizationScale-up (3-L) fermentation of the recombinant strains for AmyZ1 production. A The AmyZ1 activities and cell density at different times of strain BZ1 and BZd343. The squares represent AmyZ1 activity, and the circles represent cell density. Error bars represent standard deviation. B, C SDS-PAGE analysis of AmyZ1 in the supernatant at different time of strains BZ1 and BZd343, respectively. The target proteins were marked with arrowBack to article page