Immunohistochemical analysis of patient samples with anti-STEAP antibodies. Samples include: LNCaP cells probed in the presence of amino-terminal STEAP peptide 1 (a), LNCaP plus nonspecific peptide 2 (b), normal prostate tissue (c), grade 3 prostate carcinoma (d), grade 4 prostate carcinoma (e), LAPC-9 AD xenograft (f), normal bladder (g), and normal colon (h). (×400.)