A cortical granule
migrates from Golgic apparatus to the vitelline surface, assuming a position 0.
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.
Quantified Analysis of Cortical Granule
Distribution and Exocytose of Porcine Oocytes during Meiotic Maturation and Activation // Biology of Reproduction.
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.