preferred_name: choline(in) + 2 H(+)(out) <=> choline(out) + 2 H(+)(in)
preferred_name_lc: choline(in) + 2 h(+)(out) <=> choline(out) + 2 h(+)(in)
label: choline(in) + 2 H(+)(out) <=> choline(out) + 2 H(+)(in)
label_lc: choline(in) + 2 h(+)(out) <=> choline(out) + 2 h(+)(in)