2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + octadecanoyl-CoA <=> 1-octadecanoyl-2-(9Z,12Z)-octadecadienoyl-sn-glycero-3-phosphocholine + CoA
2-(9z,12z-octadecadienoyl)-sn-glycero-3-phosphocholine + octadecanoyl-coa <=> 1-octadecanoyl-2-(9z,12z)-octadecadienoyl-sn-glycero-3-phosphocholine + coa