fertilization membrane


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fertilization membrane

[′fərd·əl·ə′zā·shən ‚mem‚brān]
(cell and molecular biology)
A membrane that separates from the surface of and surrounds many eggs following activation by the sperm; prevents multiple fertilization.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Penetration of the egg by one sperm induces the cortical granule reaction, and a fertilization membrane is raised after a few minutes.
For animals that do not display a fertilization membrane, such as polychaetes, bivalves, and gastropods, fertilization success is sometimes assessed by the ability of eggs to cleave (e.g., Fong et al., 1995; Qiu and Qian, 1997; Ushakova and Sarantchova, 2004).
In this study, chromosome preparations were made from embryos at the early cleavage stages; there was no need to remove the fertilization membrane, yolk granules, or oil droplets.
The fertilization membrane and a fertilization cone [ILLUSTRATION FOR FIGURE 2B OMITTED] lift off from the surface of the egg after about 34 min at 6 [degrees] C, leaving a large perivitelline space of 65 [[micro]meter].
Release of ovoperoxidase from sea urchin eggs hardens the fertilization membrane with tyrosine crosslinks.
After their fertilization, the eggs were attached to one another by the fertilization membrane, showing that the membrane was sticky, especially after reaching the 2-cell stage [ILLUSTRATION FOR FIGURE 9A OMITTED].
One egg aliquot was immediately assayed to determine the presence of (1) fertilization membranes, or (2) immature or abnormal eggs.