Development -- Lin et al. 130 (3): 519 Figure IG4

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Fig. 4. Anti-insulator and promoter targeting by the PTS element. (A,B) Transgenic embryos carrying construct W78. The IAB5 enhancer selectively activates the lacZ but not the w. (C,D) The same transgenic strain after the removal of the PTS by Flip-mediated recombination. Notice that the IAB5-lacZ interaction is blocked by the suHw insulator. Arrowheads indicate FRT sites.