[Acitivity of the oxidoreductases of Actinomyces levoris strain No. 28 cultured on a medium with varying redox potential values].

When the levorin-producing organism Actinomyces levoris, strain 28 was cultivated on fermentation media under conditions of decreased oxidative-reduction values, a significant decrease in the processes of the culture multiplication and antibiotic production was observed. It was shown that the marked decrease in the catalase activity accompanied by a simultaneous increase in the dehydrogenase activity was one of the causes of the decrease in the processes of the culture multiplication and levorin synthesis. Addition of potassium chloride (0.2 per cent) stimulated the catalase activity and promoted the biomass increase and to some extent the antibiotic production.