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Fig. 1. (A) Map of the Fab-7 region showing the minor nuclease hypersensitive site (*), HS1, HS2 and HS3. GAGA sites in HS1 are indicated by colored ovals and numbers 1-6. (B) Left: map of iab-7bluetail, iab6,7P6.1, iab6,7P18.1 and iab6,7P14.1 mutations showing the bluetail transposon inserted at the distal edge (right) of Fab-7 in between HS2 and HS3. The size of the Fab-7 deletion is indicated for each mutant. Right: lacZ expression in representative germband extended embryos heterozygous for iab-7bluetail, iab6,7P6.1, iab6,7P18.1 and iab6,7P14.1. Arrow in each embryo marks the anterior edge of PS12.