title: DEAE-cellulose chromatography of creatine kinase isoenzymes--effect of pH and serum.
abstract: DEAE-cellulose chromatography (pH 7.0) of human heart extracts revealed the presence of three creatine kinase isoenzymes. The CK3 (skeletal muscle) isoenzyme was not retained on the column under these conditions. The CK2 (heart) and CK1 (brain) isoenzymes eluted at a conductivity of 5.5 +/- 0.6 m omega-1 and 11.4 +/- 1.2m omega-1, respectively. When DEAE-cellulose chromatography was performed at pH 8.0, CK2 eluted at a slightly higher conductivity, 6.5 m omega-1, whereas CK1 eluted as before 12.0 m omega-1. DEAE-cellulose chromatography of CK2 and CK1 isoenzymes in the presence of serum protein, and serum albumin had no significant effect on the elution of CK2 at pH 7.0 and 7.4, and on the elution of CK1 at pH 7.0 and 8.0 However, serum and serum albumin decreased the affinity of CK2 for DEAE-celluose at pH 8.0, and caused this isoenzyme to elute at a conductivity of 3.0-3.5 m omega-1. The decreased affinity of CK2 for DEAE-cellulose was not due to aggregation of CK2 with albumin or some other serum protein, but was related to the amount of albumin applied to the column.
mesh_terms: D001769:Blood; D001921:Brain / Q000201:enzymology*; D002848:Chromatography, DEAE-Cellulose; D003402:Creatine Kinase / Q000302:isolation & purification*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007527:Isoenzymes / Q000302:isolation & purification*; D009206:Myocardium / Q000201:enzymology*; D012709:Serum Albumin
chemical_list: D007527:Isoenzymes; D012709:Serum Albumin; D003402:Creatine Kinase