Fig. 7. Adrenal chromaffin cell number is reduced in Gata3 mutant embryos. lacZ expression (A-F) in the adrenal gland of E13.5 and E15.5 of Gata3^z/+ (A,D), Gata3^z/-:Tg^hDBH-G3 (B,E) and Gata3^Z/- (C,F) embryos. (G) Quantification of ß-gal⁺ chromaffin cells in embryos of various genotypes. At least four adrenal glands from two different embryos of each genotype were analyzed. Data are presented as mean±s.e.m. The statistical significance of the differences between Gata3^-/-:Tg^hDBH-G3 and Gata3^-/- are indicated by (^*P<0.05; Student's t-test). Scale bars: 100 µm.