The immunoglobulin class, the subclass and the ratio of kappa:lambda light chain of autoantibodies to human insulin in insulin autoimmune syndrome.

The immunoglobulin class, subclass and the k:lambda light chain ratio of insulin autoantibodies were determined in the sera of twenty-four patients with insulin autoimmune syndrome. All sera proved to be of the IgG immunoglobulin class but exhibited various IgG1:IgG2:IgG3:IgG4 ratios. The ratio of k:lambda light chain ranged from 1:0.13 to 1:0.75 with the exceptions of two sera that were characterized as IgG1(k) and IgG1(lambda).