I-Dehydrogenases yisigaba sama-enzyme adlala indima ebalulekile ekuphenduleni kwamakhemikhali ngokwenza lula ukususwa kwe-hydrogen ku-sub. amagama. Lawa ma-enzyme ahluleka ezindleleni ezahlukahlukene ze-metabolic, kufaka phakathi ukuphefumula kweselula kanye ne-biosynthesis yama-biomolecules abalulekile. Ama-dehydrogenases abandakanyeka kakhulu ekuphenduleni kokunciphisa i-oxidation, lapho akhuthaza khona ukudluliswa kwama-electrons