title: A rapid purification method for human erythrocyte pyruvate kinase.
abstract: Human erythrocyte pyruvate kinase (ATP: pyruvate phosphotransferase, E.C.2.7.1.40) is purified 30,000-fold, using a method which includes ammonium sulfate precipitation, Sephadex G-75 filtration, and Blue Dextran-Sepharose 4B chromatography. The enzyme is resolved into two peaks on Blue Dextran-Sepharose 4B. The first peak with sp act of 300 corresponds to the mature form (R4) whereas the second peak with sp act of 180 corresponds to R2R'2. Peaks I and II give one band on 10% polyacrylamide gel without SDS. Peak II gives two bands on 10% SDS gel with molecular weights 60,000 (R') and 57,500 (R). On the other hand, peak I gives only one band on 10% SDS gel having a molecular weight of 57,500. Both the R4 and R2R'2 forms of the enzyme have the same pH optimum of 7.2.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography / Q000379:methods; D004591:Electrophoresis, Polyacrylamide Gel; D004912:Erythrocytes / Q000201:enzymology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011770:Pyruvate Kinase / Q000097:blood / Q000302:isolation & purification*; D012685:Sepharose / Q000031:analogs & derivatives
chemical_list: C024908:blue dextran-sepharose; D012685:Sepharose; D011770:Pyruvate Kinase