ALB and neoplasm: In order to track the tumor targeting of bovine serum albumin–coated gold nanoparticles (GNPs–BSA) in xenografts, GNPs–BSA nanoparticles were first pre-labeled with florescent dye Cy7.5 prior to intravenous tail vein injection into animals, followed by monitoring and tracing frutescence, using IVIS in vivo imaging system.