CD46 and neoplasm: Consistent with receptor protein expression level, non-replicative Ad/F35-GFP, which binds to CD46, induced GFP expression more efficiently in HOZOT cells than either non-replicative RGD peptide fiber-modified adenovirus (Ad/RGD), which binds to integrins αvβ3 and αvβ5, or conditionally tumor-specific replicative adenovirus (OBP-401), which binds to CAR.