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Osmotic second virial coefficients and phase diagrams for aqueous proteins from a much-improved poisson - Boltzmann equation
Escola de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, CEP 21949-900, Rio de Janeiro, RJ, Brazil, Programa de Engenharia Química, COPPE, Universidade Federal do Rio de Janeiro, 21945-970, Rio de Janeiro, RJ, Brazil.
Biscaia Jr., E.C., Programa de Engenharia Química, COPPE, Universidade Federal do Rio de Janeiro, 21945-970, Rio de Janeiro, RJ, Brazil.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics .
Escola de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, CEP 21949-900, Rio de Janeiro, RJ, Brazil.
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2007 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 111, no 43, 16055-16059 p.Article in journal (Refereed) Published
Abstract [en]

A much-improved Poisson - Boltzmann equation for two globular proteins using bispherical coordinates is used to establish the potential of mean force (PMF) between two globular lysozyme particles. Calculations presented here include previously ignored ion-protein nonelectrostatic potentials. The lysozyme - lysozyme PMF is used to calculate osmotic second virial coeffiencients. The theoretical PMF curve as a function of sodium chloride concentration is successfully compared with that from experiment. Our theoretical PMF shows how the second virial coefficient and the phase diagram depends on salt concentration, pH and, most notably, on the choice of salt in the aquous solution. © 2007 American Chemical Society.

Place, publisher, year, edition, pages
2007. Vol. 111, no 43, 16055-16059 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-48266DOI: 10.1021/jp074807qOAI: oai:DiVA.org:liu-48266DiVA: diva2:269162
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Boström, Mathias

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