ID 1.14.19.24 DE acyl-CoA 11-(E)-desaturase. CA an 11,12-saturated fatty acyl-CoA + 2 Fe(II)-[cytochrome b5] + 2 H(+) + CA O2 = an (11E)-Delta(11)-fatty acyl-CoA + 2 Fe(III)-[cytochrome b5] + CA 2 H2O. CC -!- Involved in sex pheromone synthesis in the Lepidoptera (moths). CC -!- The enzyme from the moth Spodoptera littoralis prefers 13:0 and 14:0 CC substrates. CC -!- The product is formed by the stereospecific removal of the pro-R H at CC C-11 and the pro-S H at C-12. cf. EC 1.14.19.5. CC -!- Formerly EC 1.14.99.31. //