Displacement chromatography of proteins on hydrophobic charge induction adsorbent column

摘要

Displacement chromatography of protein mixtures was proposed on a hydrophobic charge induction chromatography (HCIC) column. We have used an HCIC medium, MEP Hypercel as the stationary phase and a quaternary ammonium salt, benzethonium chloride, as the displacer. The capacity factors of proteins and displacers were used to predict their performances in column displacement, and the experimental results agreed well with the prediction. An isotachic displacement train of lysozyme and |á -chymotrypsinogen A was formed with benzethonium chloride as displacer at pH 5.0 with good yields and purities of the two proteins. Column regeneration was efficiently achieved by charge repulsion between the displacer and the adsorbent at lower pH values. The results indicate that the displacement chromatography on HCIC is a good alternative to traditional hydrophobic displacement chromatography.