Effect of some amino acids and the antibiotic-ZAG-9 on proteolytic activity and antibiotic productivity of streptomyces galbus

ABSTRACT

The culture medium of SGalbus was supplemented with a number of amino acidsArginine, histidine, glutamine, tyrosine, proline and valine increased the growth after 6th day of incubation, while, valine was the most effective in promoting the antibiotic productionThe highest production of protease by SGalbus was reached during cultivation in the presence of cystineEffects of the antibiotic- ZAG-9 on growth, proteolytic activity and productivity of antibiotic were also studied