Fig. 2From: Repair of articular cartilage defects with intra-articular injection of autologous rabbit synovial fluid-derived mesenchymal stem cellsCell surface marker analysis by flow cytometry. Passage 5 rbSF-MSCs were positive for CD44 (95.4%), CD73 (96.8%), and CD90 (95.4%), and negative for CD31 (2.8%), CD34 (1.2%), and CD45 (0.16%)Back to article page