Purification of Ligandin by Affinity Chromatography on Sulfobromophthalein-Agarose Gel

Summary

Affinity chromatography of rat liver cytosol on sulfobromophthalein coupled to agarose via a glutathione bridge is described. Protein bound to the gel is eluted with 0.1 M Na₂HPO₄ at pH 9.2, resulting in a fourfold enrichment of ligandin as compared to cytosol. This technique should be useful in the study of organic anion binding to rat liver components other than cytosol, and may permit characterization of their potential role in hepatic uptake and excretory mechanisms.