Fig. 5From: 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 type I collagen deposition by encapsulated MSCs after 21 days of culture under chondrogenic conditions as shown by immunostaining: collagen (green), Hoechst (blue). Scale bars = 200 μm. CS chondroitin sulfate, HS heparin sulfateBack to article page