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Fig. 5. (A,C) Segmental plate recipients fixed 24 hours after surgery and processed
for myf5 expression. (B,D) Vibratome sections from the embryos shown
in A and C at the planes indicated. Myf5 is activated on a normal
trunk timetable, which is earlier than is appropriate for head muscles. (E,F)
Adjacent sections from a stage 20 segmental plate recipient. Graft-derived
cells within a somite-like condensation synthesize MyHC, nearly a day earlier
than it would be found in developing head muscle cells.
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