Fig. 5. Neither CREM nor ATF-1 influence survival of sympathetic neurons. Quantitative analysis of apoptotic cells reveals reduced levels of apoptosis in sympathetic neurons of Creb^DBHCre, Creb^DBHCre; Crem^+/-, Creb^DBHCre; Crem^-/- and Creb^DBHCre; Atf-1^-/- mutants at E17.5 in comparison with the respective controls. The mean±s.e.m. for both SCGs in at least three mice of each genotype are shown. Values are considered significantly different with ^*P<0.05 compared with controls.