Immunofluorescent analysis of Ataxin 3 (green) in Caco-2 cells. The cells were fixed with 4% paraformaldehyde for 15 minutes, permeabilized with 0.1% Triton X-100 in PBS for 15 minutes, and blocked with 3% BSA in PBS (Product # 37525) for 30 minutes at room temperature. Cells were stained with a Ataxin 3 mouse monoclonal antibody (Product # MA3-082) at a dilution of 1:100 in staining buffer for 1 hour at room temperature, and then incubated with a Goat anti-Mouse IgG Superclonal™ Secondary Antibody, Alexa Fluor 488 conjugate (Product # A28175) at a dilution of 1:1000 for 1 hour at room temperature. Nuclei (blue) were counterstained with Hoechst 33342 dye (Product # 62249). Images were taken on a Thermo Scientific ToxInsight Instrument at 20X magnification.