Fig. 6.

caudal mutants exhibit an ectopic neuroblast 7-3 lineage in parasegment 15. Flat preparations (maximum projections) of St12e, St12m, St13 and St17 embryos of the indicated genotype, double- or triple-stained as illustrated. PSs are depicted on the right and their borders are illustrated by a solid line. (A) Domains of Abd-B and Cad expression; (A′) Abd-B and En; (A′) Cad and En. (B) NB pattern in cad² mutant. (C) Regular NB7-3 progeny cells are marked by yellow arrowheads, ectopic ones are marked by white arrowheads and surrounded by broken lines. (D) Magnification of a completely differentiated NB7-3 lineage in PS15, forming the NB7-3 typical projections. ML, midline; WT, wild type.