A glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the latter, external but not extraneous to it. The zona pellucida first appears in multilaminar primary oocytes. [ http://en.wikipedia.org/wiki/Zona_pellucida ]

This is just here as a test because I lose it

Term information

database cross reference
Subsets

pheno_slim, vertebrate_core, human_reference_atlas

definition
  • A glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the latter, external but not extraneous to it. The zona pellucida first appears in multilaminar primary oocytes.
depicted by
  • http://upload.wikimedia.org/wikipedia/commons/8/81/Gray3.png
has broad synonym
  • zona pellucida - vitelline membrane
has related synonym
  • vitelline envelope
  • striated membrane
  • vitelline membrane
  • zona striata
  • oolemma
  • pellucid zone
  • zona radiata
homology notes
  • Outside the plasma membrane, three envelopes surround the ovum. The first, the primary egg envelope, lies between the plasma membrane and the surrounding cells of the ovary. The most consistent component of this primary layer is the vitelline membrane, a transparent jacket of fibrous protein. In mammals, the homologous structure is called the zona pellucida.[well established][VHOG]
id
  • UBERON:0000086
present in taxon
  • http://purl.obolibrary.org/obo/NCBITaxon_9606