The polypeptide can be labeled any diagnostic agent known in the art, as provided, for example, in the following references: Armstrong et al., Diagnostic Imaging, 5th Ed., Blackwell Publishing (2004); Torchilin, V. P., Ed., Targeted Delivery of Imaging Agents, CRC Press (1995); Vallabha...
were coated with recombinant human Nectin-1 extracellular domain (R&D Systems), recombinant human Nectin-4 extracellular domain (R&D Systems), mouse laminin (Invitrogen™), or bovine serum albumin (BSA; Probumin Diagnostic Grade, MilliPore) diluted in PBS. Covered plates were incubated overnight ...