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Representative expression of CD26 and CXCR4 (a) brown colored cytoplasm and membrane staining with CD26 and CXCR4 is found in most of the tumor cells with higher positivity and intensity than normal tissue. CD26 expression overlaps with CXCR4 expression in consecutive sections of same tumor tissue, suggesting a possible cooperating mechanism for the two factors in prostate cancer (b) comparison of CD26 and CXCR4 between tumor and normal tissues
