Morphological appearance of mammary glands from <i>wt</i> vs. <i>Hpse</i>-KO mice.

<p>Whole-mount preparations of mammary glands from 3-month-old virgin mice were stained with hematoxylin. <i>Hpse-</i>KO derived mammary glands (right panel) showed abundant side branches and alveolar structures compared with glands from age-matched <i>wt</i> animals (left panel).