Cells were fixed with formaldehyde, permeabilized using Triton X-100, and stained with anti-Bax antibody 6A7 which is specific to the active form (red) and Hoechst dye to stain nuclei (red). Images were recorded on a Hamamatsu ORCA-ER digital camera mounted on a Leica DMIRE2 inverted microscope. See also: Dumitru R, Gama V, Fagan BM, Bower JJ, Swahari V, Pevny LH, Deshmukh M. 2012. Human embryonic stem cells have constitutively active Bax at the Golgi and are primed to undergo rapid apoptosis. Mol Cell. 46(5):573-83.