Fig. 3.
Design and activity of minimal hypoxia-inducible enhancers. The effect of arrangement of three HBSs (A), increasing number of HBSs in par arrangement (B), cotransfection of HIF-1α(P402A, P564A) and HIF-2α(P405A, P531A) mutants (C) on reporter activity. Transfection and expression of promoter activities were as described in Fig. 1. Production of HIF-1α(P402A, P564A) and HIF-2α(P405A, P531A) mutants was evaluated by Western blotting (D).