ID 1.14.14.110 DE 2-hydroxy-1,4-benzoxazin-3-one monooxygenase. AN CYP71C3. CA 2-hydroxy-2H-1,4-benzoxazin-3(4H)-one + O2 + reduced [NADPH--hemoprotein CA reductase] = DIBOA + H(+) + H2O + oxidized [NADPH--hemoprotein CA reductase]. CC -!- A cytochrome P450 (heme-thiolate) protein. CC -!- The enzyme is involved in the biosynthesis of protective and CC allelophatic benzoxazinoids in some plants, most commonly from the CC family of Poaceae (grasses). CC -!- Formerly EC 1.14.13.140. //