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Maspin in myoepithelial cells layer. (A) Photomicrographs showing hyperplasic acini in breast tissue surrounded by myoepithelial cells, which express more Maspin than luminal cells. (B) Typical in situ component (indicated by an arrow) outlined by Maspin αV staining, whereas invasive component shows almost complete absence of peripheral Maspin. Scale bar = 100 µm. See supplementary Fig. 1 for an additional.
