Morphology and characteristics of bone marrow derived rat MSCs at passage 2. (A) Rat MSCs maintained homogenous fibroblast-like appearance after adherent culture. (B) Cell surface markers were assessed using flow cytometry. Fluorescence intensity dotplots with specific antibodies (Ab); Phenotypes of MSCs labeled with Ab against PE-CD44 (with FITC-CD45 negative; left) and PE-CD90 (with FITC-CD11b negative; right). All experiments were performed in triplicate.