Immunogen sequence: CEDDEVLDSE DLQDMSLMTL STKTPKDFFT NHTLVLHVAR SEMDKVRVFQ ATRGKLSSKC SVVLGPKWPS HYLMVPGGKH NMDFYVEALA FPDTDFPGLI TLTISLLD. Catalyzes the citrullination/deimination of arginine residues of proteins. Citrullinates histone H3 at 'Arg-8' and