Figure 7: Dual labelling of both preotic and postotic NCCs.

(a,b) CM-DiI (red) and CFDA/DiO (green) were simultaneously injected into the neural fold at the levels of r3/4 (preotic, arrow) and somite 1/2 (postotic, arrowheads), respectively (a). At day3, each dye marks migratory cells in their corresponding PAs and the outflow tract (OFT). Migration of CM-DiI-labelled preotic crest cells preceded that of CFDA-DiO-labelled postotic cells (b). (c,d) Sections of the OFT reveal each dye troops through outflow cushions. OC, outflow cushion; PA2–4, the second to fourth PAs; scale bars, 200 μm (b).