Figure 2

Biomass production depending on pH and neutralizing agent. The grey bar indicates the use of NaOH for neutralization of the culture and black bars indicate the use of NH₄OH for neutralization. Biomass production is expressed in optical density at 600 nm (path length = 1 cm) (the dry cell weight factor is 0.3 g/L/1 OD₆₀₀). Higher biomass production may be beneficial for higher yield of the produced heterologous protein.