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Fig. 3. Providing Fz locally to fz– territory.
en.Gal4 driving UAS.fz in fz–
flies provides a band of Fz expression in the P compartment (genotype 8). This
appears to have two effects: 1. The interface at the front causes a reversal
of polarity around that interface that extends one cell into the
fz– territory but more cells into the P compartment.
2. The remainder of the P compartment is rescued, with the rescue extending
one cell into the fz– territory behind. Overall, we
see a band of order imposed on the disorder seen in the majority of the A
compartment. The detail on the right shows the two zones of organised polarity
and our estimate of where the P compartment is (estimated from clones, and
from other experiments where UAS.fz is driven by hh.Gal4 in
flies carrying ptc.lacZ).
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