Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 2, Issue 7, Pages 1537-1541Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/a909173d
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Aqueous solutions of beta-lactoglobulin (at the isoelectric point pH = 5.18) have been studied by membrane osmometry. The osmotic second virial coefficient as well as the monomer-dimer equilibrium of beta-lactoglobulin have been found to depend significantly on the salt concentration. At low salt concentration the virial coefficient becomes negative, which could be attributed to dipole-dipole interactions which become important at the isoelectric point of the protein when the salt concentration decreases.
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