title: Subunits of the calcium ion-pump system of sarcoplasmic reticulum.
abstract: Sarcoplasmic reticulum membranes with high content of Ca2+ -ATPase (80% of total protein) were dissolved in a non ionic medium and were submitted to isoelectric focusing in polyacrylamide gels. The membrane protein was resolved into six main bands whose isoelectric points range from 6 to 5. The mol. wt. of these peptides is about 100 000 as estimated by second dimension electrophoresis in sodium dodecyl sulfate-polyacrylamide system. The electrophoretic behaviour of the purified ATPase enzyme is similar to that of crude membranes.
mesh_terms: D000251:Adenosine Triphosphatases / Q000302:isolation & purification / Q000378:metabolism; D000818:Animals; D001692:Biological Transport; D002118:Calcium / Q000378:metabolism*; D007525:Isoelectric Focusing; D046911:Macromolecular Substances; D008565:Membrane Proteins / Q000302:isolation & purification / Q000378:metabolism*; D008970:Molecular Weight; D009124:Muscle Proteins / Q000302:isolation & purification; D011817:Rabbits; D012519:Sarcoplasmic Reticulum / Q000378:metabolism*
chemical_list: D046911:Macromolecular Substances; D008565:Membrane Proteins; D009124:Muscle Proteins; D000251:Adenosine Triphosphatases; D002118:Calcium