1-O-hexadecyl-2-acetyl-sn-glycero-3-phosphocholine + a 1-O-(1Z-alkenyl)-sn-glycero-3-phosphoethanolamine = 1-O-(1Z-alkenyl)-2-acetyl-sn-glycero-3-phosphoethanolamine + 1-O-hexadecyl-sn-glycero-3-phosphocholine — reaction