the present invention relates generally to novel genetic sequences that encode fatty acid epoxygenase enzymes , in particular fatty acid δ12 - epoxygenase enzymes from plants that are mixed function monooxygenase enzymes . more particularly , the present invention exemplifies cdna sequences from crepis spp . and vernonia galamensis that encode fatty acid δ12 - epoxygenases . the genetic sequences of the present invention provide the means by which fatty acid metabolism may be altered or manipulated in organisms , such as , for example , yeasts , moulds , bacteria , insects , birds , mammals and plants , and more particularly in plants . the invention also extends to genetically modified oil - accumulating organisms transformed with the subject genetic sequences and to the oils derived therefrom . the oils thus produced provide the means for the cost - effective raw materials for use in the efficient production of coatings , resins , glues , plastics , surfactants and lubricants .