PSMB9 and neoplasm: To confirm further the biodistribution and in vivo tumor-targeting ability of LMP-2-specific affibody proteins, nude mice bearing C666-1 tumor xenografts were intravenously injected with Dylight755-labeled ZEBV LMP-2 affibody (15.4 nmol in 100 μl PBS per mouse) or an equal amount of unselected affibody scaffold molecule ZWT and then scanned using an NIR (near-infrared) imaging system at different time points after injection.