Fig. 7. Epistasis between Insm1, Phox2b and Mash1 in
the differentiation of sympatho-adrenal precursor cells. Analysis of the
primary sympathetic ganglion chain in wild-type (A,B),
Phox2b (C,D) and Mash1 (E,F)
mutant mice at E10.5 (A,C,E) and E12.5 (B,D,F) by in situ hybridization using
a probe specific for Insm1. (G) Schematic drawing of the epistatic
relationship between Mash1, Phox2b and Insm1. Scale bars:
100 µm in A,B.