Sustainable utilization of feather waste to produce alkaline serine protease by genetically engineered Bacillus amyloliquefaciens
Description
Figure 1: Effects of different signal peptides on the extracellular alkaline serine protease activities Figure 3: Effect of regultaion of membrane phospholipids and deletion of gene sigF on extracellular alkaline serine protease activities. Figure 4: Effect of multi-genes stacking regulation on extracellular alkaline serine protease activities. Figure 5: Effects of different concentrations of feather meals on extracellular alkaline protease activities. Figure 6a: Change curve of extracellular alkaline serine protease activity of the strains HZ12/SP0, HZ12/SP2 and ΔFCP/SP2. Figure 6b: Variation curve of soluble protein contents of strains HZ12/pHY300 and ΔFCP/SP2. Figure S4: Effects of different concentrations of feather meal on cell growth. Ck represents the initial medium containing 80 g/L of peptone.