preferred_name: dopamine(in) + 2 H(+)(out) = dopamine(out) + 2 H(+)(in)
preferred_name_lc: dopamine(in) + 2 h(+)(out) = dopamine(out) + 2 h(+)(in)
label: dopamine(in) + 2 H(+)(out) = dopamine(out) + 2 H(+)(in)
label_lc: dopamine(in) + 2 h(+)(out) = dopamine(out) + 2 h(+)(in)