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The Nernst equation applied to oxidation–reduction reactions in myoglobin and hemoglobin. Evaluation of the parameters
Author(s) -
Saroff Harry A.
Publication year - 2006
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.20652
Subject(s) - myoglobin , chemistry , nernst equation , hemoglobin , redox , monomer , oxygen , hemeprotein , computational chemistry , heme , inorganic chemistry , organic chemistry , electrode , enzyme , polymer
Analyses of the binding of oxygen to monomers such as myoglobin employ the Mass Action equation. The Mass Action equation, as such, is not directly applicable for the analysis of the binding of oxygen to oligomers such as hemoglobin. When the binding of oxygen to hemoglobin is analyzed, models incorporating extensions of mass action are employed. Oxidation–reduction reactions of the heme group in myoglobin and hemoglobin involve the binding and dissociation of electrons. This reaction is described with the Nernst equation. The Nernst equation is applicable only to a monomeric species even if the number of electrons involved is greater than unity. To analyze the oxidation–reduction reaction in a molecule such as hemoglobin a model is required which incorporates extensions of the Nernst equation. This communication develops models employing the Nernst equation for oxidation–reduction reactions analogous to those employed for hemoglobin in the analysis of the oxygenation (binding of oxygen) reaction. © 2006 Wiley Periodicals, Inc. Biopolymers 85: 450–455, 2007. This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com