Anion Exchange ResinsDrug ContaminationDialysis SolutionsRenal DialysisSepharoseElectrophoresis, Agar GelChromatography, AgaroseChromatography, AffinityMolecular WeightGelsElectrophoresisImmunoelectrophoresisDNAElectrophoresis, Polyacrylamide GelDNA Restriction EnzymesPolymerase Chain ReactionIsoelectric FocusingDNA, BacterialDNA FragmentationImmunodiffusionPlasmidsBase Sequence