title: Purification of erythrocyte band 4.1 and other cytoskeletal components using hydroxyapatite-Ultrogel.
abstract: An improved method for purifying erythrocyte band 4.1, the protein which mediates the interaction between spectrin and actin, has been developed. The new procedure, using adsorption chromatography on hydroxylapatite crystals immobilized within a crosslinked agarose gel (HA-Ultrogel), is simple and reproducibly provides a high yield of band 4.1 which is essentially free of protein kinase. Other components eluted from the hydroxylapatite matrix include band 4.9, ankyrin, and a 35,000-Da polypeptide that appears to be glyceraldehyde-3-phosphate dehydrogenase that remains bound to the erythrocyte membrane in 150 mM NaCl.
mesh_terms: D000199:Actins / Q000097:blood / Q000302:isolation & purification; D017487:Ankyrins; D001798:Blood Proteins / Q000302:isolation & purification*; D002845:Chromatography / Q000379:methods; D003598:Cytoskeletal Proteins / Q000097:blood / Q000302:isolation & purification*; D004910:Erythrocyte Membrane / Q000032:analysis* / Q000201:enzymology; D005782:Gels; D006801:Humans; D006882:Hydroxyapatites; D008565:Membrane Proteins / Q000097:blood / Q000302:isolation & purification*; D009479:Neuropeptides; D010455:Peptides / Q000097:blood; D011189:Potassium Chloride; D011494:Protein Kinases / Q000097:blood; D013049:Spectrin / Q000302:isolation & purification; D014783:Viscosity
chemical_list: D000199:Actins; D017487:Ankyrins; D001798:Blood Proteins; D003598:Cytoskeletal Proteins; D005782:Gels; D006882:Hydroxyapatites; D008565:Membrane Proteins; D009479:Neuropeptides; D010455:Peptides; C028841:erythrocyte membrane band 4.1 protein; C120557:erythrocyte membrane protein band 4.1-like 1; D013049:Spectrin; D011189:Potassium Chloride; D011494:Protein Kinases