P. citrinum C-39 was selected for it strong protease activity among various strains of molds found in soil. Studies were made on some properties of the proteolytic enzyme produced by the strain. The optimum pH of the enzyme was 3.5 and the range of it...
P. citrinum C-39 was selected for it strong protease activity among various strains of molds found in soil. Studies were made on some properties of the proteolytic enzyme produced by the strain. The optimum pH of the enzyme was 3.5 and the range of its stability to the pH was 3.0 to 4.5. The optimum temperature was 65°C, while the enzyme was instantly inactivated above 70°C. From the results of the study on the effects of metal ions, it was found that Mn++, Ba++, Zn++, and Pb++ increased the enzyme activity, on the other hand Na+ and K+ decreased it.