label: Rb(+)(in) + 2 hydrogencarbonate(in) + chloride(out) => Rb(+)(out) + 2 hydrogencarbonate(out) + chloride(in)
label_lc: rb(+)(in) + 2 hydrogencarbonate(in) + chloride(out) => rb(+)(out) + 2 hydrogencarbonate(out) + chloride(in)