Figure 4.
E2F1 binds to the minimal promoter of IRF5 in vitro. (A) CHIP for detecting binding of E2F1 to the IRF5 promoter in vitro. The protein precipitated by the anti-E2F1 antibody binds in vitro to the amplified sequence of the IRF5 promoter, whereas the anti-IgG antibody cannot precipitate the bound protein in the sequence. (B) The immunoprecipitated chromatin fragments were analyzed by quantitative PCR using primer pairs spanning the putative E2F1 binding site.