Staining of MSCs (magnification, ×200). (A) Incubation of human bone marrow MSCs with CD105 primary antibody resulted in insoluble precipitate at the antigen site. (B) Incubation of MSC linewithout CD 105 primary antibody resulted in no insoluble precipitate at the antigen site (negative control). (C) Incubation of positive MSC line obtained from American Type Culture Collection (Rockville, MD, USA) was treated with CD 105 primary antibody resulted in an insoluble precipitate at the antigen site. MSC, mesenchymal stem cells; CD 105, cluster of differentiation 105.