Immunogen sequence: FAHPYQYELN HFTPADAVLQ KPQPQLYRPI EETPCHFISS LDELVELNEK LLNCQEFAVD LEHHSYRSFL GLTCLMQIST RTEDF Highest antigen sequence identity to the following orthologs: Mouse - 86%, Rat - 89%. About 50% of patients with polymyositis/scleroderma (P