Fig. 4. Rates of protein synthesis in embryos (open circles), unfed larvae (open squares) and fed larvae (filled squares) of the sea urchin L. pictus. Each data point is the mean ± 1 s.e.m. of 5-6 determinations; where not shown, errors fell within the graphical representation of the data point. The fitted line shows an increase in rate of protein synthesis for fed larvae: y=0.25e^0.23x (r²=0.96).