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Fig. 3. Symphyseal proteoglycan content. Coronal sections (6 µm) of `middle'
joint sites from U-diet (A) and O-diet (B) subadults stained with Safranin O
to identify GAG content in the FC pad. In the high-power views of the ventral
joint with the FC pad, darker staining in A vs B indicates lower
proteoglycan content and thus decreased FC pad viscoelasticity in O-diet
rabbits. In B note also the corresponding development of bony rugosities
(`blue' bone, nearly completely traversing the `red' FC pad).