Summary: The activities of ornithine aminotransferase, sucrase and acid and alkaline phosphatases have been studied throughout sporulation in . The same enzymes were monitored during synchronous vegetative growth. Each of these enzymes has been demonstrated to increase in a ‘step’ manner during both growth and sporulation. Alkaline phosphatase increased in a two-step manner whereas the others increased in a single step. The times of increase of these enzymes formed a similar sequence during both sporulation and growth. It has been proposed that these enzymes are under a common mechanism of control during growth and sporulation and that the sequence of enzyme appearance may be used as markers of the sporulation process.


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