The oxidase activity of Aerococcus viridans is a result of the functioning of aerobic NAD-independent lactate dehydrogenase. Two fractions of flavin-containing protein which oxidize D- and L-isomers of lactic acid are revealed during the enzymic complex electrophoresis in PAAG. The enzymic complex and eluates of both fractions possess the antagonistic activity relative to 27 test-cultures of bacteria.
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