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Expression of the N reporter E(spl)m-α-GFP at the AP organizer in pupal wings. (A and D) E(spl)m-α-GFP expression (green). (B and E) Ci expression (magenta). (C and F) A merge of GFP and Ci. (A–C) A control wing. (D–F) A fu1 wing. The position of the AP border where Ci expression ends is indicated by a white arrowhead.
