Stroma-derived luminal and glandular epithelium express the cytokeratin epithelial marker.

<p>β-gal and cytokeratin double immunofluorescence labeling of <i>Amhr2-Cre</i>; <i>R26R</i> virgin and postpartum endometrium. (A–D) In non-pregnant uteri, β-gal immunoreactivity is specifically detected in the endometrial stroma and muscle cells. Luminal epithelial (LE) and glandular epithelial (GE) cells are labeled with cytokeratin immunofluorescence (E–H) In PPD 1 uteri, strong β-gal immunosignal is detected in the LE (white arrows) and co-localize with cytokeratin staining (I–L) At PPD3, β-gal-marked stroma-derived GE and LE cells express cytokeratin (white arrows: GE; white arrow heads: LE). Scale bars = 50 µm.