FIG. 8.

Oct-1 enhances, but is not essential for, Rta-mediated transactivation of the K-bZIP promoter. (A) MEFs null for Oct-1 (+Vec) or null for Oct-1 and stably expressing human Oct-1 (+hOct) were transfected with an Rta expression vector (pcDNA3FLc50) and the WT K-bZIP reporter plasmid. Cells were analyzed for transactivation as described in the legend to Fig. 3A. (B and C) WT MEF cells (B) or SLK cells (C) were tested for the ability of Rta to transactivate the indicated reporter plasmids. Results are shown as described above (A).