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Fig. 9. The nVII motor neurons migrate independently of the rest of the r4 tissues.
The r4 region was labeled by uncaging the caged fluorescein-conjugated dextran
and the cell movements were traced during development. (A) The nVII motor
neurons that migrated into r5 and r6 (arrowheads) were the only population to
come out of the labeled r4 tissue. Lateral view, anterior is to the left. (B)
Double staining with anti-caged fluorescein and anti-GFP antibodies show that
these r4-derived cells are the nVII motor neurons. Ventral views. Scale bars:
50 µm.