Fig. 6From: A comparative study of chondroitin sulfate and heparan sulfate for directing three-dimensional chondrogenesis of mesenchymal stem cellsEffects of mechanical stiffness, type, and concentration of ECM (CS or HS) on sGAG deposition after 21 days of culture under chondrogenic conditions as shown by Safranin-O staining. Scale bars = 200 μm. CS chondroitin sulfate, HS heparin sulfate, sGAG sulfated glycosaminoglycanBack to article page