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lkb1 regulates Yki target genes downstream of wts. (A–E) MARCM clones in third instar larval CBs. (A) Ex protein levels in control clones. (B) lkb1x5 mutant clones accumulate Ex. (C) Overexpression of UAS-hpo does not rescue up-regulation of Yki targets. Expression of UAS-yki RNAi (D) or UAS-wts (E) rescues Ex accumulation caused by loss of lkb1 function. Clones are marked by GFP expression. (Scale bars, 50 μm.)
