pyruvate(in) + H(+)(in) => pyruvate(out) + H(+)(out)
pyruvate(in) + h(+)(in) => pyruvate(out) + h(+)(out)
pyruvate(in) + H(+)(in) => pyruvate(out) + H(+)(out)
pyruvate(in) + h(+)(in) => pyruvate(out) + h(+)(out)