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Immunohistochemical analysis of CD45R expressing lymphocytes in CA scaffold co-cultured in vitro tumors. (a) LNCaP, (b) C4-2, and (c) C4-2B human prostate cancer cells in CA scaffolds were co-cultured with PBLs for 2 and 6 days; scale bars are 20 μm. The brown color denotes positive staining of B cells and the cell nuclei are counterstained blue.
