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  • Title: Uptake of Ca2+ is one of the earliest responses to fertilization of sea urchin eggs.
    Author: Paul M, Johnston RN.
    Journal: J Exp Zool; 1978 Jan; 203(1):143-9. PubMed ID: 624920.
    Abstract:
    Sea urchin eggs take up Ca for 10 min following insemination (determined as uptake of 45Ca from the SW (3)). Although 90% of this uptake occurs after the beginning of the cortical reaction and may represent external binding of Ca to the egg surface coats, there is a brief phase of uptake (o-30 sec) which precedes the cortical reaction; this may represent a Ca flux into the eggs.
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