Additional file 3.

Description: Mesenchymal progenitor cells derived from murine bone marrow (BM), perirenal adipose tissue (PAT), and mediastinal stromal tissue (MST) do not show differentiation via MMB (A) and MMS (B) without application of specific induction media. Expression of collagen type II and X as well as of bone sialoprotein (BSP) and osteopontin (OP) were analyzed by immunostaining, and these results serve as additional negative controls. Nuclei are stained with DAPI (blue). DIC = differential interference contrast.

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Böhrnsen et al. BMC Cell Biology 2009 10:92   doi:10.1186/1471-2121-10-92