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