Jul 9, 1999

Isothermal titration calorimetry and differential scanning calorimetry as complementary tools to investigate the energetics of biomolecular recognition

Journal of Molecular Recognition : JMR
I Jelesarov, H R Bosshard

Abstract

The principles of isothermal titration calorimetry (ITC) and differential scanning calorimetry (DSC) are reviewed together with the basic thermodynamic formalism on which the two techniques are based. Although ITC is particularly suitable to follow the energetics of an association reaction between biomolecules, the combination of ITC and DSC provides a more comprehensive description of the thermodynamics of an associating system. The reason is that the parameters DeltaG, DeltaH, DeltaS, and DeltaCp obtained from ITC are global properties of the system under study. They may be composed to varying degrees of contributions from the binding reaction proper, from conformational changes of the component molecules during association, and from changes in molecule/solvent interactions and in the state of protonation.

Mentioned in this Paper

Thermodynamics
Titrimetry
Plasma Protein Binding Capacity
Calorimetry
Calorimetry, Differential Scanning
Titration Method

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