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Fig. 1. kek1 expression in wing and eye discs. Expression of the kek1-lacZ enhancer trap line in the third instar wing and eye discs (A and D, respectively). Ectopic expression of UAS-DERDN in the wing pouch using MS1096-Gal4 and behind the morphogenetic furrow of the eye disc using GMR-Gal4 strongly reduce kek1-lacZ expression (C and F, respectively). Conversely, expression of an activated DER (UAS-{lambda}top) using the same drivers leads to an expansion of kek1-lacZ expression in the corresponding domains of the wing (B) and eye discs (E).