label: a 1-acyl-sn-glycero-3-phosphocholine(in) + Na(+)(in) => a 1-acyl-sn-glycero-3-phosphocholine(out) + Na(+)(out)
label_lc: a 1-acyl-sn-glycero-3-phosphocholine(in) + na(+)(in) => a 1-acyl-sn-glycero-3-phosphocholine(out) + na(+)(out)