Calculation of transformed thermodynamic properties of biochemical reactants at specified pH and pMg

A Short History of the Thermodynamics of Enzyme-catalyzed Reactions

“…Here n c stands for the amount of a component, which is something that is conserved (25). The transformed Gibbs energy GЈ is defined as follows (26,27).…”

Thermodynamics of reactions catalyzed byL-iditol 2-dehydrogenase: the xylose assimilation pathway

“…Specifically, they can be used for biochemical reactions analogous to the way standard formation properties for species are used to calculate standard Gibbs free energies and standard enthalpies of chemical reference reactions. The basis for the calculation of these transformed formation properties has been discussed previously, (30) and the methodology has been applied to a number of biochemical reactants. (31)(32)(33) Following these earlier papers and the convention (30) of making a transformation for all the hydrogen atoms in these substances, we have used the formation properties given in table 6 to calculate the values of D f H'°m and D f G'°m given in table 7.…”

“…The basis for the calculation of these transformed formation properties has been discussed previously, (30) and the methodology has been applied to a number of biochemical reactants. (31)(32)(33) Following these earlier papers and the convention (30) of making a transformation for all the hydrogen atoms in these substances, we have used the formation properties given in table 6 to calculate the values of D f H'°m and D f G'°m given in table 7. The values of the standard transformed formation properties of the biochemical reactants xylose(aq) and xylulose 5-phosphate(aq) in table 7 were calculated from the standard formation properties of the species which were based on a thermochemical cycle calculation.…”

Thermodynamics of Systems of Biochemical Reactions

“…This makes it possible to calculate the contribution that ATP makes to any reaction in which it is involved. Alberty & Goldberg (1992) calculated the standard transformed thermodynamic properties of the ATP series at specified pH and pMg.…”