The enzyme 2-hydroxyisoflavanone dehydratase () catalyzes the chemical reaction
This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is 2,7,4â²-trihydroxyisoflavanone hydro-lyase (daidzein-forming). This enzyme is also called 2,7,4â²-trihydroxyisoflavanone hydro-lyase. This enzyme forms part of the pathway to isoflavones from flavonoids. The starting material, 2,4',7-trihydroxyisoflavanone, is produced from liquiritigenin by the enzyme isoflavonoid synthase
2-hydroxyisoflavanone dehydratase also acts on the intermediate tetrahydroxyisoflavanone produced from naringenin, leading to genistein.
The variant GmHID1 from Glycine max shows both these activities..