Fig. 5From: Enhanced extracellular raw starch-degrading α-amylase production in Bacillus subtilis by promoter engineering and translation initiation efficiency optimizationEffect of the dual-promoters modification on the extracellular AmyZ1 expression. A The extracellular activities and cell densities of strains with different modified dual-promoters. Error bars represent standard deviation. B SDS-PAGE analysis of AmyZ1. The target proteins were marked with arrowBack to article page