cortical granule

cortical granule

[′kȯrd·ə·kəl ′gran·yəl]
(cell and molecular biology)
Any of the round to elliptical membrane-bound bodies that occur in the cortex of animal oocytes, contain mucopolysaccharides, and participate in formation of the fertilization membrane.
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Although we expected crushing force to increase at fertilization due to the cortical granule reaction, mean crushing force was significantly greater in unfertilized chorions than in fertilized chorions.
This was not similar to the well-defined dynamics of cortical granule formation in our previous observations during in vitro maturation in the dromedary camel oocyte (17).
The relation between ionized calcium and cortical granule exocytosis in eggs of the sea urchin Echinus esculentus.
This event is thought to be a weak blocking against polyspermy, because the classic cortical reaction initiated by cortical granule exocytosis could not be observed in this species.
In several studies, evidence was presented for the importance of cholesterol and other lipids that impart negative curvature in cortical granule fusion (reviewed in this issue by Abbenini et al.
In a transmission electron microscopy (TEM) study of the formation of the fertilization envelope of Branchiostoma floridae, Holland and Holland (1989) demonstrated that this structure is always single and evidently forms by the organization of exocytosed cortical granule material on the inside of a vitelline layer.
The cortical granule serine protease CGSP1 of the sea urchin, Strongylocentrotus purpuratus, is autocatalytic and contains a low-density lipoprotein receptor-like domain.
After fertiliza tion, gold particles could be seen specifically in the cortical granule contents that were just being discharged outside the egg (Fig.
It is the product of cortical granule exocytosis and subsequent chemical modifications that result in a hardening of the egg's surface (1).
Minor changes at the structure of cortical granules were detected (Figs.