oxidoreductase activity, acting on paired donors, with oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water acyl-lipid omega-6 desaturase (cytochrome b5) activity https://github.com/geneontology/go-ontology/issues/23540 https://github.com/geneontology/go-ontology/issues/28070 https://github.com/geneontology/go-ontology/issues/28526 oleoylphosphatidylcholine desaturase activity GO:0050184 oleoyl-CoA desaturase activity MetaCyc:RXN-9669 oleate desaturase activity linoleate synthase activity 1-18:1-2-18:3-phosphatidylcholinedesaturase activity MetaCyc:RXN-8330 phosphatidylcholine desaturase activity 1-18:1-2-18:2-phosphatidylcholine synthase activity KEGG_REACTION:R03475 MetaCyc:PHOSPHATIDYLCHOLINE-DESATURASE-RXN RHEA:66456 1-18:2-2-18:1-phosphatidylcholine desaturase activity (SN2-18:2 forming) GO:0102855 RHEA:46332 GO:0102857 1-acyl-2-oleoyl-sn-glycero-3-phosphocholine:NAD+ delta12-oxidoreductase activity MetaCyc:RXN-8360 EC:1.14.19.22 1-18:1-2-18:2-phosphatidylcholine desaturase activity GO:0102861 GO:0102860 Catalysis of the reaction: a (9Z)-octadecenoyl-containing glycerolipid + 2 Fe(II)-[cytochrome b5] + 2 H+ + O2 = a (9Z,12Z)-octadecadienoyl-containing glycerolipid + 2 Fe(III)-[cytochrome b5] + 2 H2O. 1-16:0-2-18:1-phosphatidylcholine desaturase activity MetaCyc:RXN-8328 MetaCyc:RXN-8327 molecular_function MetaCyc:RXN-8322 MetaCyc:RXN-8324 GO:0102871 MetaCyc:RXN-8320