title: Affinophoresis in two-dimensional agarose gel electrophoresis: specific separation of biomolecules by a moving affinity ligand.
abstract: Affinophoresis is an electrophoretic separation technique for biomolecules which uses an affinophore. An affinophore is a macromolecular polyelectrolyte bearing affinity ligands. It migrates rapidly in an electric field, and consequently the electrophoretic mobility of molecules having affinity for the ligand is specifically changed. This technique has now been incorporated in two-dimensional agarose gel electrophoresis in a procedure which utilizes normal electrophoresis in the first dimension and affinophoresis in the second dimension. Proteins which do not have affinity for the ligand migrate to locations along a diagonal line passing through the origin, whereas proteins which have affinity are carried away from the line by the affinophore. Accordingly, molecules having affinity for the ligand can be readily assigned. Trypsins contained in Pronase and pancreatin were separated by this procedure using an affinophore bearing a competitive inhibitor for trypsin, benzamidine, on a polyanionic molecule (a polyacrylic acid derivative).
mesh_terms: D000345:Affinity Labels; D000818:Animals; D004586:Electrophoresis / Q000379:methods*; D004587:Electrophoresis, Agar Gel / Q000379:methods*; D010194:Pancreatin / Q000302:isolation & purification; D011402:Pronase / Q000302:isolation & purification; D011506:Proteins / Q000302:isolation & purification; D013552:Swine; D014357:Trypsin / Q000302:isolation & purification*
chemical_list: D000345:Affinity Labels; D011506:Proteins; D010194:Pancreatin; D014357:Trypsin; D011402:Pronase