Fig. 4From: Abrasion arthroplasty increases mesenchymal stem cell content of postoperative joint effusionsChondrogenic differentiation of mononuclear cells isolated after AAP. High density culture after 21 days were stained against chondrogenic markers: Sox9, collagen II, proteoglycan, chondroitin-4-sulfate. Second lane shows no-primary controls. Bar represents 100 μmBack to article page