Fig. 2From: High-level extracellular protein production in Bacillus subtilis using an optimized dual-promoter expression systemExtracellular β-CGTase expression driven by different dual-promoter systems in B. subtilis strains. Extracellular β-CGTase activity (white), dry cell weight (black) (a). SDS-PAGE analysis of extracellular β-CGTase expression by these plasmid-containing strains (b) (P < 0.05)Back to article page