Fig. 7
The llk gene is required for migration of the nVII motor neurons in a non cell-autonomous manner. Mosaic experiments were performed to determine the cell autonomy of the llk gene. A total of 8 wild-type embryo-derived nVII motor neurons (arrows) all failed to migrate caudally in 3 llk rw16 host embryos (A). (A′) The peripheral axons (arrowheads) of these cells were comprised in a part of the facial motor axons bundle. (B) In contrast, a total of 21 llk rw16 embryo-derived nVII motor neurons (arrows) migrated normally through r5 into r6 in 2 wild-type host embryos. (A,B) Dorsal views; (A′) lateral views, anterior is to the right, 2 dpf. Scale bar: 50 µm.
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