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Fig. 7. Sections through E7 midbrain (A,B) and trunk (C,D) chimera mandibles
showing the distribution of QCPN-positive cells after grafting dorsal neural
tubes directly into stage 11-12 first branchial arches. QCPN is red, Collagen
II is green and the sections are counterstained with DAPI. Midbrain controls
show numerous neural crest in the tongue (Tn) and mandibular process,
including Meckel's cartilage (Mk). Trunk neural crest form aggregates of cells
adjacent to but not within Meckel's cartilage. Bh, Basihyal cartilage.