Fatty Acid DesaturasesFatty AcidsLinoleoyl-CoA DesaturaseMortierellaFatty Acids, UnsaturatedCytochromes b5CalendulaMolecular Sequence DataAmino Acid SequenceSubstrate SpecificityCloning, MolecularFatty Acids, Omega-3Fatty Acids, NonesterifiedFatty Acids, Omega-6Fatty Acid SynthasesPhylogenyFatty Acids, EssentialSaccharomyces cerevisiaeStearoyl-CoA DesaturasePrimulaLinoleic Acid