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Terminal deoxynucleotide transferase-mediated dUTP nick end labeling (TUNEL) was used to determine the number of positive apoptotic cells for mouse hearts with and without I/R treated with oral probenecid or water (A). Representative stained images for hearts treated with water without I/R (B) and after I/R (C). dUTP indicates deoxyuridine triphosphate; I/R, infusion/reperfusion.
