1.14.19.5 additional information all unsaturated pheromone products are produced via a DELTA11 Z-desaturation mechanism 1.14.19.5 additional information the enzyme is involved in the biosynthesis of Spodoptera littoralis sex pheromone 1.14.19.5 additional information catalyses key reactions leading to mono- and di-unsaturated fatty acyl-moities 1.14.19.5 additional information DELTA11-desaturase is involved in the biosynthesis of Z/E11-14:OAc 1.14.19.5 additional information heterologous expression in yeast shows that Dpu-D11-LPAE produces large amounts of DELTA11-monoenoic acids, in particular the Z11-16:Me and Z11-18:Me in a 1.5:1 ratio. When supplemented with the Z9-16:Me, yeast extracts of Dpu-D112-LPAE contained no 9,11-16:Me, but contain small amounts of E9,Z11-and E9,E11-16:Me when supplemented with E9-16:Me 1.14.19.5 additional information heterologous expression in yeast shows that Dpu-DELTA11-APSQ produces a series of mono-unsaturated products. These monoenes are identified as DELTA8-12:Me, DELTA 8-14:Me and DELTA 8-16:Me. When supplemented with the Z9-16:acid, yeast cells transformed with Dpu-DELTA11-APSQ do not produce the DELTA8-unsaturated fatty acid methyl esters, but produce significant amount of di-unsaturated 9,11-C16 methylesters 1.14.19.5 myristic acid + 2 ferrocytochrome b5 + O2 + 2 H+ - 1.14.19.5 myristoyl-CoA + reduced acceptor + O2 a single enzyme may be responsible for the formation of both (Z)- and (E)-11-tetradecanoic acids. It is also possible that two mechanistically identical discrete enzymes are involved in each desaturation 1.14.19.5 myristoyl-CoA + reduced acceptor + O2 enzyme is involved in the biosynthesis of Spodoptera littoralis sex pheromone 1.14.19.5 palmitic acid + reduced acceptor + O2 enzyme is not involved in production of polyunsaturated fatty acids