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Erythrocyte membrane; protein acylation; band 3 protein; anion-transport protein
Abstract:
By repetetive acylation up to two-thirds of the integral proteins of the RBC membrane may be solubilized. The release of proteins from particulate material into supernatant phase is proportional to the release of protein-bound 3H2DIDS. Gel filtration of the solubilized acylated integral proteins in detergent-free media indicates a strong aggregation of band 3 protein. LiDS/Sepharose-chromatography gives a very similar elution profile for the integral protein components originating from soluble and particulate fraction. Amino acid analyses and fragmentation patterns of the two band 3 protein fractions show no significant differences.