preferred_name: L-lysine(out) + H(+)(out) => L-lysine(in) + H(+)(in)
preferred_name_lc: l-lysine(out) + h(+)(out) => l-lysine(in) + h(+)(in)
label: L-lysine(out) + H(+)(out) => L-lysine(in) + H(+)(in)
label_lc: l-lysine(out) + h(+)(out) => l-lysine(in) + h(+)(in)