Objective Bone marrow mesenchymal stem cells(MSCs) were separated, cultured and identified. Methods bone marrow of a-week-old rat was obtained, separated with Percoll, then cultured in DNEM medium containing 20% FCS and passaged. Then surface markers of MSCs, CD44 and CD45 were detected with Flow cytometry analysis and Sudan IV and AKP stain were performed. Results CD44、CD45 expressed lightly, and the results of Sudan IV and APK stain were negative. Conclusion The cultured cells have strong ability of proli...