1-octadecanoyl-2-(9Z,12Z)-octadecadienoyl-sn-glycero-3-phosphocholine + N-(acetyl)-sphing-4-enine <=> 1-octadecanoyl-N-(acetyl)-sphing-4-enine + 2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine
1-octadecanoyl-2-(9z,12z)-octadecadienoyl-sn-glycero-3-phosphocholine + n-(acetyl)-sphing-4-enine <=> 1-octadecanoyl-n-(acetyl)-sphing-4-enine + 2-(9z,12z-octadecadienoyl)-sn-glycero-3-phosphocholine
1-octadecanoyl-2-(9Z,12Z)-octadecadienoyl-sn-glycero-3-phosphocholine + N-(acetyl)-sphing-4-enine <=> 1-octadecanoyl-N-(acetyl)-sphing-4-enine + 2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine
1-octadecanoyl-2-(9z,12z)-octadecadienoyl-sn-glycero-3-phosphocholine + n-(acetyl)-sphing-4-enine <=> 1-octadecanoyl-n-(acetyl)-sphing-4-enine + 2-(9z,12z-octadecadienoyl)-sn-glycero-3-phosphocholine