ID 1.14.20.5 DE flavone synthase I. AN FNS I. CA 2-oxoglutarate + a flavanone + O2 = a flavone + CO2 + H2O + succinate. CC -!- The enzyme, which has been found in rice and in members of the CC Apiaceae (a plant family), is a member of the 2-oxoglutarate- CC dependent dioxygenases, and requires ascorbate and Fe(2+) for full CC activity. CC -!- Formerly EC 1.14.11.22. DR Q7XZQ8, FNSI_PETCR ; //