staining was used to evaluate the cytoplasmic maturation of bovine oocytes.
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.
Quantified Analysis of Cortical Granule
Distribution and Exocytose of Porcine Oocytes during Meiotic Maturation and Activation // Biology of Reproduction.--1997.--No.
(2005) showed bovine oocytes cultured at 41[degrees]C did not have a compromise ability to undergo nuclear progression to MII or cytoplasmic maturation (cortical granule
translocation to the oolemma).
The relation between ionized calcium and cortical granule
exocytosis in eggs of the sea urchin Echinus esculentus.
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., pp.
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.
It is the product of cortical granule
exocytosis and subsequent chemical modifications that result in a hardening of the egg's surface (1).
Round cortical granules
with an electron dense and round appearance arranged as a layer beneath the plasma membrane with most density between groups (Fig.
Minor changes at the structure of cortical granules
were detected (Figs.
were also noted in the close proximity to the oolemma.