Fig. 1. The numbers of neurones with pyknotic nuclei and the total number of neurones in the SCG of wild-type, Ngf^–/–, Bax^–/– and Ngf^–/– Bax^–/– mice at E14, E18 and P1 in litters resulting from crossing Ngf^+/– Bax^+/– mice. The mean and s.e.m. of counts from both SCG of three to five embryos of each genotype at each age are shown.