The Cytoskeleton and Polyspermy in Sea Urchin Eggs
At fertilization the sea urchin egg undergoes a dramatic structural reorganization of its surface. Within the first few seconds there is a depolarization of the egg plasma membrane and this is followed by a transient increase in intracellular Ca++. The elevated Ca induces the exocytosis of cortical granules and the resulting fertilization membrane helps make the egg refractory to further insemination.
KeywordsCortical Actin Cortical Granule Cortical Reaction Rhodamine Phalloidin Cell BioI
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