| NADPH methemoglobin reductase |
an enzyme of the erythrocytes that catalyzes the reduction of methemoglobin to hemoglobin via oxidation of NADH. The physiological significance of the enzyme is uncertain; no endogenous intermediate electron carrier has been found, although the enzyme can be activated if methylene blue or other artificial electron acceptor is introduced. Called also methemoglobin reductase (NADPH).
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