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Fig. 6. Dosage-dependent requirement for Foxa1/2 in the differentiation
of mDA neurons and a progressive rescue of mDA neuron number in mutant embryos
during development. (A-C) Bar charts showing the number of immature
(Nurr1+ TH-) and mature (Nurr1+
TH+) neurons, as determined by immunohistochemistry, in embryos
carrying 0-4 copies of Foxa1 and/or Foxa2 at three different
stages. The x-axis shows the genotype of the mouse embryos, and the
y-axis indicates the number of cells.