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Fig. 1. iro7 is expressed in a restricted domain of the neural plate with
a posterior border at the prospective r4/r5 boundary. (A-P) Embryos stained by
double in situ hybridisation with the indicated probes (colour coded).
Anterior is towards the top, stages are indicated at the bottom right-hand
corner of each picture. (A,B) Whole mounts; (C-P) flat mounts. The arrowheads
in I,J,M,N indicate krx20-expressing cells in prospective r5. The
arrows in G,J,K indicate a mesodermal domain of iro7 expression (pm
for paraxial mesoderm). (Q) Summary of expression data, anterior is towards
the left. mb, midbrain; sc, spinal cord.