Abstract
Unfertilized sea urchin ( Lytechinus pictus) and sand dollar ( Dendraster excentricus) eggs exposed to trypsin are stimulated to incorporate labelled amino acids into proteins at greatly increased rates. This increase in protein synthesis in trypsin-treated sand dollar eggs is a result of their parthenogenetic activation, whereas the sea urchin eggs do not exhibit any morphological signs of activation from the effects of trypsin. Attempts to artificially activate sea urchin eggs with cyclic adenosine 3′, 5′-monophosphate were unsuccessful.
Published Version
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