Fig. 3. Cross-sections through trigeminal ganglia of E15 chimeras (A,D,G) showing QCPN-positive nuclei (red) of large and small quail cells (B,E,H). The cells with large QCPN-positive nuclei are dispersed mostly in the dorsal part of the ganglia whereas those with small QCPN-positive nuclei are dispersed throughout the entire ganglia. Some of the QCPN-positive large cells are trkA positive (green) (C,F,I). (J) The percentage of large QCPN-positive nuclei significantly decreases in cardiac and trunk neural crest chimera ganglia. ^*P<0.001.