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[Regulation of alpha-amylase biosynthesis in Bacillus diastaticus mutants with various levels of enzyme synthesis].

The regulation of alpha-amylase biosynthesis was studied in Bacillus diastaticus mutants with different levels of the enzyme synthesis (by two orders of magnitude). The enzyme biosynthesis was shown to be regulated by induction and catabolite repression. Maltose, starch and methyl-alpha,D-glucoside (which cannot be metabolised) induced the synthesis while glucose and fructose acted as catabolite repressors.