label: a 1-O-(1Z-alkenyl)-sn-glycero-3-phosphocholine(in) + H(+)(in) => a 1-O-(1Z-alkenyl)-sn-glycero-3-phosphocholine(out) + H(+)(out)
label_lc: a 1-o-(1z-alkenyl)-sn-glycero-3-phosphocholine(in) + h(+)(in) => a 1-o-(1z-alkenyl)-sn-glycero-3-phosphocholine(out) + h(+)(out)