Abstract
Conclusions The human γ-globulins, γ-A and γ-B, identified by monkey antisera, and γ-C, identified by both monkey and horse antisera, have antibody activity. In 3 sera from patients with chronic thyroiditis, the γ-A, γ-B and γ-C were shown to have anti-thyroglobulin activity by radioautography with I125 labeled thyroglobulin after immuno-electrophoresis. Addendum: After submission of this paper, an abstract has appeared which confirms the observations made here (Fed. Proc. 23:454, 1964—W. D. Terry and J. L. Fahey). Dr. Sheldon Dray provided monkey and horse anti-sera and Dr. Howard C. Goodman supplied thyroglobulin extract and thyroiditis sera.