1'-[1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phospho]-3'-[1-(9Z-octadecenoyl)-2-hexadecanoyl-sn-glycero-3-phospho]-glycerol + 1-(9Z-hexadecenoyl)-sn-glycero-3-phosphocholine = 1-(9Z-hexadecenoyl)-2-hexadecanoyl-sn-glycero-3-phosphocholine + 1'-[1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phospho]-3'-[1-(9Z-octadecenoyl)-sn-glycero-3-phospho]-glycerol — reaction