BSA and lysozyme adsorption on homoionic montmorillonite: Influence of the interlayer cation

Abstract : This study aims to investigate the influence of interlayer cation alkali metal series (Li+, Na+, K+, Rb+, Cs+) and alkali earth metal (Mg2 +, Ca2 +, Ba2 +) on adsorption of model proteins (lysozyme and bovine serum albumin). The localizations of both proteins and their conformational modifications in the interlayer space of the natural clay mineral were studied by X-ray diffraction, transmission electronic microscopy and fluorescence experiments. Based on Langmuir model isotherms, a strong influence of interlayer cation on maximum adsorbed amount and adsorption equilibrium constant has been observed. However the usual kosmotrope/chaotrope classification cannot be used to describe protein adsorption.
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Mathilde Lepoitevin, Maguy Jaber, Régis Guégan, Jean-Marc Janot, Philippe Dejardin, et al.. BSA and lysozyme adsorption on homoionic montmorillonite: Influence of the interlayer cation. Applied Clay Science, Elsevier, 2014, 95, pp.396-402. ⟨10.1016/j.clay.2014.05.003⟩. ⟨insu-01017005⟩

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