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Figure 2 In situ detection of apoptosis in the rabbit atherosclerotic femoral artery 14 days after balloon angioplasty. (A) Monoclonal antibody against poly (ADP-ribose) polymerse-1 (red). (B) T4 deoxyribonucleic acid (DNA) ligase (purple). (C) Single-stranded DNA (red). (D) Terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (brown). Magnification x40 (A–D). Counterstaining with hematoxylin (D).