Abstract
Immunoelectrophoretically pure IgG1 and IgG2 were isolated from sera of guinea pigs with experimental autoimmune renal tubular disease by chromatography on QAE-Sephadex A-50 (Pharmacia Fine Chemicals, Piscataway, N.J. using a two-step elution. As judged by indirect immunofluorescence tests of the fractions, 70% of the original autoantibody activity to tubular basement membrane was recovered.