Fig. 4. Comparison of the effects of MSP and NGF on the survival of SCG neurons during development. Percent survival of E14, E17 and P1 SCG neurons after 48 hours incubation in defined medium alone (Control) or medium supplemented with 10 ng/ml MSP, 10 ng/ml NGF or MSP plus NGF. Graph of the percent survival of E14 SCG neurons after 48 hours incubation with a range of concentrations of MSP. The means and standard errors for data obtained from three petri dishes for each experimental condition are shown.