Formation of some extracellular enzymes during the exponential growth of Bacillus subtilis

The formation of the exoenzymes, neutral and alkaline proteinase as well as alpha-amylase of Bacillus subtilis, is characterized by the same time course. The exoenzyme formation starts in the exponential phase of growth by an excess of C and N sources. We assume that carbon metabolism of pyruvate is responsible for the exoenzyme formation during this growth phase. The proteinase formation at the transient and/or stationary phase of growth is related to amino acid limitation.