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Histochemical staining with Wisteria floribunda agglutinin (WFA) of tissue sections from breast cancer patients. Panels (a), (b), and (c) indicate the tissues from patients with stages I, II, and III, respectively, and panel (d) indicates one of patients with fibrocystic disease of the breast. Arrows indicate carcinoma lesions. WFA binds glycans with the LacdiNAc group described in [19]. The WFA-positive staining shows brown color.
