Fig. 10From: Rheumatoid arthritis antigens homocitrulline and citrulline are generated by local myeloperoxidase and peptidyl arginine deiminases 2, 3 and 4 in rheumatoid nodule and synovial tissueCellular localization of (a) F95 in RA, (b) PAD2 in RA, (c) PAD3 in RA, (d) MPO in RA, (e) PAD4 in RA and (f) PAD4 staining in OA. The scale bar indicates 50 μm. L lumen of synovial cavity, black arrow intact neutrophil, arrowhead disrupted neutrophilBack to article page