Immunofluorescent analysis of Phalloidin (magenta) and HDAC2 (green) in A431 cells. Formalin fixed cells were permeabilized with 0.1% Triton X-100 in PBS for 10 minutes at room temperature and blocked with 2% BSA (Product # 37525) in PBS + 0.1% Triton X-100 for 30 minutes at room temperature. Cells were probed with a HDAC2 polyclonal antibody (Product # PA1-861) at a dilution of 1:75 for at least 1 hour at room temperature, washed with PBS, and incubated with DyLight 488 goat anti-rabbit IgG secondary antibody (Product # 35552) at a dilution of 1:250 for 30 minutes at room temperature. Actin was stained with DyLight 633 Phalloidin (Product # 21840) at a dilution of 1:120 (2.5units/mL final concentration) and nuclei (blue) were stained with Hoechst (Product # 62249) at a concentration of 1 µg/mL for 30 minutes. Images were taken on a Zeiss Axio Observer Z1 microscope at 20X magnification.