The gene encodes for the enzyme Cytochrome P450 monooxygenase. It catalyzes the intermediary step of the Momilactone A diterpene phytoalexin biosynthesis pathway by converting 3-beta-H-primara-7,15-diene into 3-beta-H-primara-7,15-diene-19,6-beta-olide. The transcript expression was induced in the leaves and in suspension culture cells after exposure to UV light and chitin oligosaccharide elicitor.