Fig. 5. Symphyseal type II collagen. Coronal sections (6 µm) of the `middle' joint site in 4-month old U-diet (A) and O-diet (B) subadults stained with a primary antibody directed against type II collagen. In the high-power views of the ventral joint, darker staining in the FC pad of A vs B demonstrates less type II collagen and thus lower viscoelasticity in O-diet rabbits.