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:  
chemistry classification
drug effects enzymology
immunology metabolism
microbiology pathology
physiology parasitology
radiography radiation effects
radionuclide imaging secretion
transplantation ultrastructure
ultrasonography virology
Record Number:   15439 
Unique Identifier:   D015044 

Occurrence in VHL: 		 

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