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ENZYME entry: EC

Accepted Name
Morphine 6-dehydrogenase.
Alternative Name(s)
Naloxone reductase.
Reaction catalysed
Morphine + NAD(P)(+) <=> morphinone + NAD(P)H
  • Also acts on some other alkaloids, including codeine, normorphine and ethylmorphine, but only very slowly on 7,8-saturated derivatives such as dihydromorphine and dihydrocodeine.
  • In the reverse direction, also reduces naloxone to the 6-alpha- hydroxy analog.
  • Activated by 2-mercaptoethanol.
PRIAM enzyme-specific profiles1.1.1.218
KEGG Ligand Database for Enzyme Nomenclature1.1.1.218
IUBMB Enzyme Nomenclature1.1.1.218
MEDLINEFind literature relating to
P82809, AK1CD_MESAU;  Q02198, MORA_PSEPU;  P82810, MORA_RABIT;  

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