Flavone synthase II (CYP93B16) from soybean (Glycine max L.)

The enzyme responsible for the inducible accumulation of 7,4′-dihydroxyflavone in soybean cell cultures was identified as a flavone synthase of type II, and classified as CYP93B16. The biochemical characterization of the recombinant protein indicated a direct and stereoselective formation of the flavone from the flavanone substrate.