autoantibodies to cytoplasmic antigens ( ica ) , surface antigens , or a membrane protein of 64 kda identified by immunoprecipitation , autoantibodies to secreted products such as insulin and proinsulin , and autoantibodies that are cytotoxic to cultured beta cells are islet specific autoantibodies that have been described .
C0021641
insulin
C0033362
proinsulin