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Immunofluorocytochemical analysis of the expression of CK-8, EpCAM, and PDX-1 in primary cells respectively isolated from the 7 PDX models. DAPI (blue fluorescence) specifically stains nuclei of individual primary cell isolates. Green fluorescence denotes expression of EpCAM; red fluorescence denotes PDX-1; and purple fluorescence denotes CK-8.
