Search on: ZONA PELLUCIDA 
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Descriptor English:   Zona Pellucida 
Descriptor Spanish:   Zona Pelúcida 
Descriptor Portuguese:   Zona Pelúcida 
Tree Number:   A05.360.490.690.950
A11.284.295.310.990
A11.497.497.900
A16.690.900
Definition English:   A tough transparent membrane surrounding the OVUM. It is penetrated by the sperm during FERTILIZATION. 
History Note English:   91(75); was see under OVUM 1975-90 
Allowable Qualifiers English:  
CH chemistry CL classification
DE drug effects EN enzymology
IM immunology ME metabolism
MI microbiology PS parasitology
PA pathology PH physiology
RE radiation effects TR transplantation
UL ultrastructure VI virology
Record Number:   15439 
Unique Identifier:   D015044 

Occurrence in VHL: 		 

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