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Fig. 3. Derepression of 22UZ Zeste and 22UZ GAGA transgenes in Pc3 mutant embryos. (A,B) 22UZ GAGA. (C,D) 22 UZ Zeste. Expression in wild-type embryos is shown on the left (Wt). Expression in Pc3 embryos in shown on the right (Pc3). The arrowheads mark the anterior and posterior boundaries of Ubx expression in wild-type embryos. The increased expression to the left of the anterior arrowhead in Pc3 homozygous embryos shows the derepression of the transgenes. All embryos were stained for the same length of time.