Fig. 1. Expression of Gata2 and Gata3 in chick sympathetic ganglia. Frozen sections at the brachial level of E6 chick embryos were analysed for the expression of Gata2 and Gata3 by in-situ hybridisation. Sympathetic ganglia display a strong hybridisation signal for Gata2 (black arrowheads), whereas Gata3 expression was not detected (white arrowheads). In the spinal cord both Gata2 and Gata3 are expressed (black arrows). da, dorsal aorta.