Fig. 3: Immunofluorescent staining (left panel) and fluorescent activated cell sorting (FACS) analysis (right panel) on SKBR3 (HER2/neu positive) and MCF7 (HER2/neu status normal) cells.

Trastuzumab-Qtag2, Fab-Qtag2, scFv-Qtag2 and VHH-Qtag2 were conjugated with AlexaFluor488-cadaverine and the antigen binding profile was compared to the commercially available Neu-antibody(24D2)-PE. Green, AlexaFluor488 or PE signal; blue, DAPI (nucleus).