Therefore, a second, very sensitive method such as immunodetection on 2D-PAGE, was chosen to confirm the results of the broad range proteome approach and to investigate whether known antigens in RA (e.g. fibrinogenβ (Fibβ), fibrinogenγ (Fibγ), fibronectin and vimentin) are present in these complexes. This evidence concerns the gene VIM and rheumatoid arthritis.