RP-HPLC/TLC analysis of ecdysteroids after sad-, dib-, sad and dib-, or GFP-transfected S2 cell incubations with the [3H]ketotriol (2,22dE) substrate. (A) sad (filled circles) or GFP (open circles) + [3H]ketotriol. ?, Unidentified metabolite conjugate. (Inset) TLC analysis of [3H[22dE product. (B) dib (filled circles) or GFP (open circles) + [3H]ketotriol. (Inset) TLC of [3H]2dE product. (C) sad and dib (filled circles) or GFP (open circles) + [3H]ketotriol. (Inset) TLC of [3H]E (ecdysone) product.