Summary: produced three exoenzymes (a staphylolytic endopeptidase, a hexosaminidase and a protease) coordinately under a range of conditions of induction and repression by various peptides and carbohydrates. Mutants of were isolated and shown to have pleiotropic variations in the production of the three enzymes. Hypo- or hyperproducing mutants of one enzyme were invariably hypo- or hyperproducers for the other two enzymes. Mutants that had lost the ability to produce one of the exoenzymes invariably failed to produce the other two enzymes. Revertants isolated from non-producers that regained the ability to produce one of the exoenzymes always regained the ability to produce the other two as well. These results suggest that the three exoenzymes share a common regulatory or processing mechanism.


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