β
Dolly Parton
π
Fiction
π
2016
π
Penguin Young Readers Group
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English
β 824 KB
π 2 views
β¦ LIBER β¦
The zona pellucida: A coat of many colors
β Scribed by Paul M. Wassarman
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 831 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0265-9247
No coin nor oath required. For personal study only.
β¦ Synopsis
The zona pellucida is an extracellular coat that surrounds all mammalian eggs. It is a porous matrix of interconnected filaments that are assembled from glycoproteins synthesized and secreted by growing oocytes. The zona pellucida is responsible both for species-specific binding of sperm to unfertilized eggs and inducing bound sperm to undergo the acrosome reaction. The latter enables sperm to penetrate the extracellular coat and fertilize the egg. The zona pellucida also a i h in prevention of polyspermy following fertilization and in protection of preimplantation embryos. In mice, several of these important functions can
now be ascribed to specific zona pellucida glycoproteins that have been purified and characterized. Furthermore, the enzyme responsible for hatching of embryos from the zona pellucida, just prior to implantation, has been ident$ed and characterized.
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## Abstract IAM38 is the most prominent protein of the inner acrosomal membrane extracellular coat (IAMC) of spermatozoa. It is retained by the inner acrosomal membrane after the acrosome reaction and is implicated in secondary spermβzona binding (Yu et al., Dev Biol2006;290:32β43). Its gene knocko