Nucleic acids encoding antigens associated with polymyositis and dermatomositis

摘要

Proteins including at least one epitope of the Mi-2 antigen, which are used for the diagnosis of dermatomyositis, and proteins including at least one epitope of the PM-Scl antigen, which are used for the diagnosis of polymyositis, particularly polymyositis-scleroderma overlap disorders are provided in an easily purified form for use in immunoassays and purification of the associated autoantigens. DNA that encode these proteins and that may also be used in diagnostic assays or as probes to obtain related DNA are also provided.