A total of 10 formalin-fixed, paraffin-embedded biopsy breast tumors were available. Immunohistochemistry was performed as described previously (30 (link)). The samples were stained with the LMO4 antibody (dilution, 1:100) used in the western blotting experiments. Diaminobenzidine (DAB; Boster Inc.) was used for color development. The specimens were observed via a Olympus BX51 light microscope (Olympus Corp.) at ×100 magnification.