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Fig. 2. Changes in (A) total protein and (B) the amount of alanine in the free
amino acid pool during development and growth of the sea urchin Lytechinus
pictus. Embryos, open circles; unfed larvae, open squares; fed larvae,
filled squares. Values are means ± s.e.m., and where not shown errors
fell within the graphical representation of the data point. (A) Changes in
total protein content. Each data point is the mean value of 2-3
determinations. The fitted line shows an increase in protein content for fed
larvae: y=20.68e0.17x
(r2=0.99). (B) Changes in the amount of alanine in the
free amino acid pool. Each data point is the mean of 6 measurements. The
fitted line shows an increase in alanine in fed larvae:
y=2.460e0.19x (r2=0.99).