Osmotic Cross Second Virial Coefficient (B-23) of Unfavorable Proteins : Modified Lennard-Jones Potential

A chromatographic method is used to measure interactions between dissimilar proteins in aqueous electrolyte solutions as a function of ionic strength, salt type, and pH. One protein is immobilized on the surface of the stationary phase, and the other is dissolved in electrolyte solution conditions flowing over that surface. The relative retention of proteins reflects the mean interactions between immobile and mobile proteins. The osmotic cross second virial coefficient calculated by assuming a proposed potential function shows that the interactions of unfavorable proteins depend on Solution conditions, and the proposed model shows good agreement with the experimental data of the given systems.This work was supported by Seoul R&BD Program (CR070027). In Addition, the authors are grateful to Prof. J. M. Prausnitz from UC Berkeley for his valuable comments and help