Immunohistochemical analysis of acetyl-histone H3 and H4 expression levels in ovarian lesions.

<p>Acetyl-histone H3 and H4 proteins are absent in the majority of the normal ovarian samples (<b>A</b>, <b>F</b>). In contrast, they are positively expressed in the nuclei of benign ovarian tumor cells (<b>B</b>, <b>G</b>), borderline tumor cells (<b>C</b>, <b>H</b>), and serous (<b>D</b>, <b>I</b>) and mucinous (<b>E</b>, <b>J</b>) adenocarcinoma.