When we measured fluorescence generated by GFP and DsRed2 (Fig. 2C), we found that GFP fluorescence in PC3DsRed2+GFP‐CD133+ and DU145DsRed2+GFP‐CD133+ cells was strongest near the bone lesion and weaker within the tumor mass, suggesting that CD133‐overexpressing PC cells attach to and interact with the bone surface. Here, PROM1 is linked to neoplasm.