Immunolabeling for collagen VI in the articular cartilage of the mouse tibial plateau cartilage.

<p>Top row: Collagen VI is found exclusively in the pericellular region of chondrocytes in the wild-type PCM (left). Bottom row: Corresponding DIC images overlaid with collagen VI labeling (green) and nuclear staining (red). Cartilage of the <i>Col6a1^−/−</i> mice (right) shows no labeling for collagen VI. Scale bar, 50 µm. WT = <i>Col6a1^+/+</i>; KO = <i>Col6a1^−/−</i>.