Heat-capacity measurements and thermodynamic functions of crystalline adenine; revised thermodynamic properties of aqueous adenine

Thermodynamic properties of enzyme-catalyzed reactions involving cytosine, uracil, thymine, and their nucleosides and nucleotides

“…This is because the standard Gibbs energies of formation of species in the CTP series, UTP series and TTP series cannot yet be connected with the elements in their reference states. There are two ways these limitations can be removed: (1) Apparent equilibrium constants can be measured for a series of reactions connecting these species with the elements, or (2) The entropies of these species can be determined by use of the third law measurements, and enthalpies of formation can also be determined [3][4][5].…”

“…The requirement for these calculations is that moities of these reactants must appear on both sides of the catalyzed reactions. The calorimetric research by BoeiroGoates and coworkers [3][4][5] has eliminated this requirement for reactions involving the ATP and IMP series. Species data for 199 biochemical reactants are stored in BasicBiochemData3 [6].…”

Biomolecules in hydrothermal systems: Calculation of the standard molal thermodynamic properties of nucleic-acid bases, nucleosides, and nucleotides at elevated temperatures and pressures

“…n Personal communication from J. Boerio-Goates. o Calculated from density data in Boyer et al (2003) and molecular weight.…”

“…q Boerio-Goates et al (2001). r Calculated from density data from Boyer et al (2003). s Calculated using Eq.…”

Use of standard Gibbs free energies and standard enthalpies of adenosine(aq) and adenine(aq) in the thermodynamics of enzyme-catalyzed reactions

“…The recent determinations of third law entropies, enthalpies of combustion, and heats and Gibbs free energies of solution in water of adenosine(cr) [1] and adenine(cr) [2] have yielded standard Gibbs free energies of formation D f G m and standard enthalpies of formation D f H m of these uncharged species in dilute aqueous solutions. This is of considerable interest in connection with the thermodynamics of enzyme-catalyzed reactions, but these applications require complicated calculations that are described in this paper.…”