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Repression effects of the RE1 motifs on a heterologous promoter. NIH3T3 cells were transiently transfected with SV40 promoter/luciferase fusion constructs carrying wild-type or mutated RE1 motifs of (A) α–internexin, (B) NF-H or (C) NF-M. Relative luciferase activitires were compared to those of pGL3-promoter, which carries the SV40 minimal promoter.
