The BPAE cells illustrated above were labeled with MitoTracker Red CMXRos before fixing, and the cells were subsequently stained with Alexa Fluor 488 conjugated to phalloidin, followed by Hoechst 33258, a popular DNA-binding counterstain. Images were recorded in grayscale with a Hamamatsu ORCA-AG camera system coupled to an Olympus BX-51 microscope equipped with bandpass emission fluorescence filter optical blocks provided by Omega Optical. During the processing stage, individual image channels were pseudocolored with RGB values corresponding to each of the fluorophore emission spectral profiles.