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Expression of Sema7A transcripts in HH17 chick embryos. Lateral views of the embryos (A, C) and a dorsal view of the midbrain/hindbrain regions (B) are shown. The section plane is indicated by a broken arrow and the section result is shown in D. Note the expression of Sema7A in migrating neural crest cells in cranial facial region (arrowheads in C) and in trunk region (D). so, somites; nc, neural crest; dm, dermomyotome; nt, neural tube. Scale bar = 100 μm.
