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Fig. 6. Transverse sections through ICR embryos with 26 somites (A) and 32 somites
(B) after labelling with DiI at the level of the second somite. The most
ventrally located labelled cells (arrows) are in regions lateral and ventral
to the pharynx (ph) at 26 somites, and by 32 somites, labelled cells have
reached the wall of the cardiac outflow tract (oft). Scale bars: 40 µm in
A; 20 µm in B. nt, neural tube.