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Na activates the Z promoter (Zp) in EBV-negative cells. HeLa cells were transfected with one of the indicated reporter constructs (Zp-CAT, −65Zp-CAT, EA-pBS-CAT, or pBS-CAT) in conjunction with either pRC (vector) or pRC-FLAG-BRRF1 (Na). Cells were harvested at 48 h posttransfection and CAT assays were performed. The data represent the results of two independent experiments.
