Tags: Enzyme.
In enzymology a 4a-hydroxytetrahydrobiopterin dehydratase (EC 4.2.1.96) is an enzyme that catalyzes the chemical reaction(6R)-6-(L-erythro-12-dihydroxypropyl)-5678-tetrahydro-4a- hydroxypterin (6R)-6-(L-erythro-12-dihydroxypropyl)-78-dihydro-6H-pterin + H2OThus the two substrates of this enzyme are (6R)-6-(L-erythro-12-dihydroxypropyl)-5678-tetrahydro-4a- and hydroxypterin whereas its two products are (6R)-6-(L-erythro-12-dihydroxypropyl)-78-dihydro-6H-pterin and H2O.This enzyme belongs to the family of lyases specifically the hydro-lyases which cleave carbon-oxygen bonds.