Cytochrome b5 reductase
Cytochrome b5 reductase is an enzyme
in the blood. It controls the amount of iron in your red blood cells, and helps the cells carry the normal amount of oxygen.
Persons who do not have enough of this enzyme may develop a condition called methemoglobinemia
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.