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.