Fig. 7. (A and B) Northern blotting for Dpt induction shows that ecdysone receptor (EcR) and ultraspiracle (Usp) are both required for the potentiation of Dpt induction by 20E, as determined by RNA interference (RNAi)-mediated silencing using dsRNA. (C) Western blot with mouse monoclonal antibody AB11 against USP; the western blot was performed on the same samples used in the northern blot; RNAi successfully silenced Usp.