PMID: 9641272Jun 26, 1998Paper

Autocatalytic oxidation of hemoglobin by nitrite: a possible mechanism

Free Radical Biology & Medicine
E Lissi

Abstract

Oxidation of oxyhemoglobin by nitrite ions to produce methemoglobin is one of the more employed procedures to oxidize the hemoprotein. The process takes place readily after a clear induction time. This behaviour is usually explained in terms of an autocatalytic reaction mechanism. However, the generally accepted mechanism is not autocatalytic and cannot explain the main features of the process. In the present work it is proposed that the characteristics of the process require the occurrence of a fast reaction between oxyhemoglobin and nitrogen dioxide. This process acts as a branching step, leading to the observed autocatalysis.

References

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Citations

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