The second virial coefficient as a predictor of protein aggregation propensity: A self-interaction chromatography study.

作者: A. Quigley , D.R. Williams

DOI: 10.1016/J.EJPB.2015.07.025

关键词:

摘要: The second osmotic virial coefficients (b2) of four proteins – lysozyme, recombinant human lactoferrin, concanavalin A and catalase were measured by self-interaction chromatography (SIC) in solutions varying salt type, concentration pH. Protein aggregate sizes based on the initial hydrodynamic radius protein solution species present using dynamic light scattering, relationship between b2 size was studied. linear correlation established values for all proteins, almost conditions. Aggregate 0. observed trends as a function conditions very much dependent, with notable including existence attractive interactions (negative values) at low ionic strengths A, highly positive lactoferrin over wide range conditions, reflecting lactoferrin’s innately high stability. It is concluded that quantification protein–protein SIC data potentially valuable screening tool predicting aggregation propensity.

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