Fig. 2.
Binding of Sp1 to hypersensitive sites and globin gene promoters in induced and uninduced A181γ cells. Input DNA or DNA immunoprecipitated by Sp1 antibodies was amplified for 28 cycles in 25 μl of reaction using pairs of the primers indicated in Table 1. I, induced; U, uninduced; In, input DNA; IP, immunoprecipitated DNA.