Micrographs for the apoptosis of hepatocytes using terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labelling (TUNEL) assay. Original magnifications a, b, c, d, e, f: ×200. a: Control; b: SeS; c: SeD; d: di(2-ethylhexyl)phthalate (DEHP); e: DEHP/SeS; f: DEHP/SeD groups. Apoptosis of hepatocytes was detected by TUNEL assay using Cell Death Detection kit according to the manufacturers' instructions. Terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labelling-positive (apoptotic) cells are indicated by arrow.