preferred_name: biotin(in) + 2 Na(+)(in) => biotin(out) + 2 Na(+)(out)
preferred_name_lc: biotin(in) + 2 na(+)(in) => biotin(out) + 2 na(+)(out)
label: biotin(in) + 2 Na(+)(in) => biotin(out) + 2 Na(+)(out)
label_lc: biotin(in) + 2 na(+)(in) => biotin(out) + 2 na(+)(out)