= Isosbestic point
{wiki=Isosbestic_point}
An isosbestic point is a specific wavelength in a spectroscopic measurement where the absorbance (or transmittance) of the light remains constant, regardless of the concentration of the absorbing species involved in a chemical equilibrium. This phenomenon often occurs in systems where two or more species are interconverting, such as in acid-base reactions, conformational changes, or the binding of ligands to a receptor. In a typical situation involving a chemical equilibrium between two forms (e.g.
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