Presence of inositol 1,4,5-trisphosphate receptor, calreticulin, and calsequestrin in eggs of sea urchins and Xenopus laevis.


The presence of inositol 1,4,5-triphosphate receptor (InsP3R), calreticulin, and calsequestrin was demonstrated in eggs of sea urchins (Lytechinus pictus, Lytechinus variegatus, and Strongylocentroutus purpuratus) and Xenopus laevis. Binding of inositol 1,4,5-trisphosphate (InsP3) to microsomes of L. pictus eggs was inhibited by heparin and NaCl. An… (More)


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