Figure 2From: Knee loading reduces MMP13 activity in the mouse cartilage Histological sections with Safranin O staining. (A) Articular cartilage of the knee joint for the age-matched control, OA control without knee loading, and OA with knee loading. (B) Magnification of the squared regions. The OA control sample without knee loading presented a significant lack of staining, while the OA sample with knee loading restored Safranin O staining.Back to article page