(R)-malate(in) + 2 H(+)(in) <=> (R)-malate(out) + 2 H(+)(out)
(r)-malate(in) + 2 h(+)(in) <=> (r)-malate(out) + 2 h(+)(out)
(R)-malate(in) + 2 H(+)(in) <=> (R)-malate(out) + 2 H(+)(out)
(r)-malate(in) + 2 h(+)(in) <=> (r)-malate(out) + 2 h(+)(out)