. "Catalysis of the reaction: (S)-lactate + 2 ferricytochrome c = pyruvate + 2 ferrocytochrome c." . . . "cytochrome b2" . "lactic acid dehydrogenase activity" . "L-lactate dehydrogenase (cytochrome) activity" . "(S)-lactate:ferricytochrome-c 2-oxidoreductase activity" . "cytochrome b2 (flavin-free derivative of flavocytochrome b2)" . "dehydrogenase, lactate (cytochrome)" . "flavocytochrome b2" . "L(+)-lactate:cytochrome c oxidoreductase activity" . "L-lactate cytochrome c oxidoreductase activity" . "L-lactate cytochrome c reductase activity" . "L-lactate ferricytochrome c oxidoreductase activity" . "lactate dehydrogenase (cytochrome)" . "lactic cytochrome c reductase activity" . . .