title: System for simplified discontinuous-gradient polyacrylamide-gel electrophoresis.
abstract: We describe a modified polyacrylamide gel electrophoresis method with which plasma proteins are excellently resolved in 4 h. We made a three-layer discontinuous gradient gel with concentrations of 80,60, and 45 g of polyacrylamide per liter of tris(hydroxymethyl)aminomethane/ethylenediaminetetraacetic acid/borate buffer, pH 9.2. Time and material needed in the preparation of the gel was greatly decreased, a well-resolved (22-25 bands) pattern was obtained in 1 h, and the gel slabs were easier to remove from the cell than were gels prepared according to the manufacturer's specifications. We saw a marked shift in the higher polymers of haptoglobin type 2-2 toward the cathode in this system, and also a clearly resolved double band of alpha2-macroglobulin in whichthe more anodal band appears to represent alpha2-macroglobulin/protease complex.
mesh_terms: D001797:Blood Protein Electrophoresis / Q000379:methods; D002021:Buffers; D004589:Electrophoresis, Disc / Q000379:methods*; D006242:Haptoglobins / Q000032:analysis; D006801:Humans; D000511:alpha-Macroglobulins / Q000032:analysis
chemical_list: D002021:Buffers; D006242:Haptoglobins; D000511:alpha-Macroglobulins