Gene Expression

Most of the extracellular hydrolase enzymes produced by Bacillus species are induced during the transition from vegetative growth to stationary phase, where they appear to function to increase the range of substrates that may be used to sustain growth. The expression of the genes encoding some of these enzymes appears to be linked to, but not necessary for, sporulation itself (e.g., alkaline and neutral proteases), while others (e.g., a-amylases and alkaline phosphatases) are linked to the exhaustion of specific substrates.

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