FIG. 3.

Lower DBD concentrations are required to protect the A2 ERE than the pS2 ERE. The level of A2 and pS2 ERE half site protection on the coding strand is expressed as the percentage of cleaved DNA and was calculated by determining the amount of cleaved DNA in each ERE half site in the absence of DBD relative to the amount of cleaved DNA in each ERE half site in the presence of DBD. Each point represents the mean ± standard error of the mean from three to four independent experiments.