Next, the 3 RA-rmAbs were tested for their reactivity in ELISAs to other RA-associated antigens including anti–cyclic citrullinated peptide (anti-CCP) ELISA, citrullinated fibrinogen, and the FLS-associated antigens calreticulin and vimentin, which are known RA autoantigens and migrate to a similar 60 kDa position in RA-FLS protein extract electrophoresis. This evidence concerns the gene CALR and rheumatoid arthritis.