Figure 5.

HLEC on AM after subcutaneous implantation in athymic Balb/c mice. (A) Haematoxylin and eosin staining showed a markedly stratified epithelium with cuboidal basal epithelial cells. (B) K3 keratin was not expressed by the basal layer, but was strongly expressed by all suprabasal and superficial epithelial cells. (C) K14 keratin was expressed by all layers. (D) Negative control. The dotted line indicates the upper border of the stratified epithelium. Magnification: 200× (A); 400× (C, D).