Fig. 2From: Long non-coding XIST raises methylation of TIMP-3 promoter to regulate collagen degradation in osteoarthritic chondrocytes after tibial plateau fractureSuccessful isolation and culture of chondrocytes. a Normal and OA cartilage tissues stained with toluidine blue (× 200). b Immunocytochemical staining of normal and OA chondrocytes (× 400)Back to article page