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Why pH Titration in Protein Solutions Follows a Hofmeister Series

Bostrom, Mathias Anders; Lonetti, Barbara; Fratini, Emiliano; Baglioni, Piero; Ninham, Barry


Measurements of pH in single-phase cytochrome c suspensions are reported. The pH, as determined by a glass electrode, has a fixed value. With the addition of salt, the supposedly fixed pH changes strongly. The pH depends on salt type and concentration and follows a Hofmeister series. A theoretical interpretation is given that provides insights into such Hofmeister effects. These occur generally in protein solutions. While classical electrostatic models provide partial understanding of such...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Journal of Physical Chemistry B
DOI: 10.1021/jp051025t


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