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