Fig. 4From: High-level extracellular protein production in Bacillus subtilis using an optimized dual-promoter expression systemExtracellular β-CGTase expression by plasmid-containing strains CGT7 (a) and CGTd4 (b) with glucose addition. Extracellular β-CGTase activity (white), dry cell weight (black) (P < 0.05)Back to article page