Figure 1

Fluorescence micrographs of cell nuclei released from one section of a paraffin-embedded tonsil, prepared as described in the “Materials and Methods” section: (a) 4′,6-diamidino-2-phenylindole (DAPI) and (b) TdT-mediated FITC-dUTP nick end-labeling (TUNEL)-FITC. A distinct discrimination between TUNEL-negative cell nuclei and TUNEL-positive apoptotic nuclei (*) and chromatin bodies (arrows) can be seen. Scale bar = 10 μm.