Representative binding models for ITC data fitting

Experimental setups and nomenclature used in AFFINImeter

In Syringe: A=Titrant, B=co-solute; In the cell: M:titrate, Solvent, B= co-solute
Table I. Schematic representation of ITC experimental setups and nomenclature used in AFFINImeter.

Representative binding models based on a Stoichiometric Equilibria approach

Representative binding models based on a Stoichiometric equilibria approach. Fitting of the ITC isotherm(s) to these models provide the Stoichiometric binding constant and the enthalpy change of each equilibrum involved in the reaction scheme.(*) The number in parenthesis,

Basic, predefined models

Tabla-Modelos-II-a

Models based on 1:2 complexes

Tabla-Modelos-II-b

Models based on autoassociation

Models based on autoassociation from a Stoichiometric Equilibria approach

 

 

Models based on competitive experiments

models-based-on-competitive-experiments
Models based on competitive experiments from a Stoichiometric Equilibria approach

 

 

 

Representative binding models based on an independent sites approach

Representative binding models based on an independent sites approach Fitting of the ITC isotherm(s) to these models provide the Site binding constant and the enthalpy change of each ligand – site interaction. (*) The number in parenthesis, (I), (II), (III), (IV) or (V) refers to five ITC experimental setups, respectively (see TABLE I for a schematic description).

 

One ligand binding to a Receptor

Tabla-Modelos-III

Two competing ligands binding to a receptor

Tabla-Modelos-III-cont

 

The scientific team of AFFINImeter has just released three NOTES regarding this subject to guide users into the right selection of binding model approach and a better understanding of stoichiometric vs site binding constants.

 

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