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Appl Environ Microbiol. 1967 November; 15(6): 1309-1312
Copyright © 1967 American Society for Microbiology. All Rights Reserved.

Conditions Influencing the Synthesis of Acid Protease by Mucor pusillus Lindt¹

Department of Animal Sciences, Purdue University, Lafayette, Indiana 47907

ABSTRACT

Protease synthesis by Mucor pusillus Lindt, in a wheat bran medium under submerged conditions, was influenced by substrate concentration, initial pH of the medium, and temperature of incubation. A 4% wheat bran (dry weight) concentration was satisfactory for enzyme production. The initial pH of the medium had a substantial effect on enzyme synthesis; adjustment of the enzyme production medium to pH 5.0 prior to sterilization was desirable. Incubation at 35 C resulted in the best enzyme yields. Under optimal conditions of enzyme production, maximal activity was detected after 5 days of incubation. The enrichment of the medium with glucose increased the yield of mycelia but lowered the amount of enzyme produced.

¹ Published with the approval of the Director of the Purdue University Agricultural Experiment Station as Journal Series Paper No. 3091.