For using actinomyceteous extracellular aminoacylase in production of optically active amino acids it is necessary to have the fermentation broth with lowered contents of extracellular pigments whose accumulation dynamics in the process of the strain growth correlates with the dynamics of the enzyme biosynthesis. The results of the studies showed that it was possible to regulate biosynthesis of the aminoacylase and pigments in the direction of increasing the enzyme production and decreasing the pigment formation by using a medium of the respective composition and providing the respective high temperature and sufficient aeration for the strains.
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