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Fig. 7. The neural crest cell-cell long-range contact develops as two neighboring
cells move apart. Selected images taken from a typical time-lapse confocal
imaging session showing the interaction between two neighboring neural crest
cells that move apart and continue to maintain contact. Initially (t=0), the
red cell is migrating within the stream, moving laterally from r6 (not shown,
but to the left in the figure). The red cell undergoes cell division to
produce a progeny (blue cell) (t=15 minutes). As the blue cell moves away
(t=15 minutes), a thin cellular process is maintained (arrow). As the blue
cell continues to move laterally (t=30 minutes), the length of the cellular
process increases (arrow). Also, the green neighboring cell continues to
migrate in the lateral direction. The contact between the red and blue cells
lengthens until it breaks at an arbitrary point (t=60 minutes), leaving
remnants (arrow). The red cell begins to move toward the blue cell. The blue
cell continues to move in the lateral direction and is nearly out of the field
of view (t=90 minutes). The green cell migrates near to the location of the
previous position of the blue cell and (t=120 minutes) the red cell makes
contact with the green cell. The diameter of the red cell at (t=0) is about 10
µm.
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