Figure 1.

Histochemical analysis of arthritc paw sections. Immunohistochemistry with the small immunoprotein L19 on arthritic paw sections reveals expression of extra domain B of fibronectin (EDB) in the tunica synovialis and inflammatory infiltrates (a) and (b). An immunofluorescent co-staining shows co-localisation of CD31 (green) and EDB (red) surrounding vascular structures (c)–(e). Scale bars = 100 μm.