Representative western blots of differentiated BMSCs and MMSCs. Collagen type II, the most important indicator for chondrogenesis, was expressed much higher in MMSCs than that in BMSCs. Meanwhile, BMSCs displayed higher expression of osteocalcin, a typical production of osteogenesis. Note that our data were normalized to GAPDH, and obtained from at least three independent experiments. (P < 0.05).