Affiliation:
1. From the Physiology Department, Stanford University, Stanford University
Abstract
1. The term "coupled redox potential" is defined.
2. The system lactic ion
See PDF for Equation
pyruvic ion + 2H+ + 2e is shown
to be reversible (when the enzyme is lactic acid dehydrogenase) and its coupled redox potential between pH 5.2 and 7.2 at 32°C. is:
See PDF for Equation
3. The free energy of the reaction:
lactic ion (1m) → pyruvic ion (1m) = -ΔF = –14,572.
4. The standard free energy of formation (ΔF298) of pyruvic acid (l) is estimated at –108,127. This is merely an approximation as some necessary data are lacking.
5. The importance of coupled redox potentials as a factor in the regulation of the equilibrium of metabolites is indicated.
Publisher
Rockefeller University Press
Cited by
16 articles.
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