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Representative sections of control (a, c) and caffeine-treated (b, d) prostatic lobes submitted to the Transferase-Mediated Biotinylated UTP Nick End-Labelling (TUNEL) reaction. Ventral (a, b) and dorsal (c, d) prostates. The arrows indicate typical positively stained apoptotic epithelial cells that were used to determine the TUNEL index. Scale bars: 10 μm.
