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