(S)-lactate(in) + (S)-malate(out) => (S)-lactate(out) + (S)-malate(in)
(s)-lactate(in) + (s)-malate(out) => (s)-lactate(out) + (s)-malate(in)
(S)-lactate(in) + (S)-malate(out) => (S)-lactate(out) + (S)-malate(in)
(s)-lactate(in) + (s)-malate(out) => (s)-lactate(out) + (s)-malate(in)