CUF37-2a reacts with the VEEV E2 glycoprotein. HEK 293 cells were transfected with plasmids expressing either the E2 or E1 glycoprotein of VEEV. 48 h later, the cells were fixed and reacted with 10 μg/ml CUF37-2a, 1A3B7 (E2-specific) or 3B2A9 (E1-specific) followed by anti-mouse IgG-FITC. The first two columns show representative fields of view under UV illumination. The third column shows identical brightfield views of negative UV-illuminated views.