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Comparison of transcriptional activity of Xenopus rhodopsin promoters stably integrated into the genome of 293 cells. Stable cell lines with integrated XOP (−5361/+41)-luciferase (#2 and #4) or XOP (−503/+41)-luciferase (#10 and #11) DNA were transfected in the absence or presence of Otx5, LNrl, Otx5-LNrl or hCrx-hNrl, and assayed for luciferase activity. Activities are presented in RLU normalized to total protein (μg) and represent mean ± S.E.M. (n = 4).
