VTN and osteosarcoma: As shown in Figure 4, three human dental pulp (hDPC) cells, the human osteosarcoma cell line, SaoS2, parental heterogeneous MC3T3-E1 cells, and mouse myoblast cell line, C2C12 were clearly unable to attach to wells coated with 100 nM rPP, but did attach to wells coated with 100 nM rC-DMP-1 and vitronectin, which was similar to the results obtained for MG63 and MC3T3-E1 cells.