D-mannose(in) + H(+)(in) => D-mannose(out) + H(+)(out)
d-mannose(in) + h(+)(in) => d-mannose(out) + h(+)(out)
D-mannose(in) + H(+)(in) => D-mannose(out) + H(+)(out)
d-mannose(in) + h(+)(in) => d-mannose(out) + h(+)(out)