It have been considered the data on unusual properties of myoglobin and hemoglobin which are associated with the generation of oxygen’s active forms and promote the oxidation of many organic substances. The processes like these may be conditionally referred to the reactions of hemoprotein autooxidation, peroxidase and monooxidase reactions, and cooxidation. Comparative structural and functional properties of myoglobin and hemoglobin and hemoprotein enzymes (peroxidase, catalase, CYP450) have been presented.
