Fig. 6From: High-level extracellular protein production in Bacillus subtilis using an optimized dual-promoter expression systemExtracellular β-CGTase expression by plasmid-containing strain CGTd4 in a 3-L fermenter. Extracellular β-CGTase activity (■), Dry cell weight (▲) (a). SDS-PAGE analysis of β-CGTase in the 57.5-h culture supernatant (b) (P < 0.05)Back to article page