Immunohistochemical staining using CD44 antibody (10R-CD44ePG) | Representative images of immunohistology of ovine synovium from NOC (A–F), saline-treated (G–I), Hyalgan-treated (J–L) or HYADD 4-G treated (M–O) joints stained with negative control antibodies (A–C) or antibodies to CD44 (D, G, J, M); CTGF (E, H, K, N) or iNOS (F, I, L, O). Bar represents 100 um for all images, which were captured at ×200 magnification.