preferred_name: taurine(in) + H(+)(in) <=> taurine(out) + H(+)(out)
preferred_name_lc: taurine(in) + h(+)(in) <=> taurine(out) + h(+)(out)
label: taurine(in) + H(+)(in) <=> taurine(out) + H(+)(out)
label_lc: taurine(in) + h(+)(in) <=> taurine(out) + h(+)(out)