A structure directly adjacent to the outer surface of the plasma membrane of an ovum. It is composed mostly of protein fibers, with protein receptors needed for sperm binding, binding to sperm plasma membrane receptors. The species-specificity between these receptors contributes to prevention of breeding between different species [Wikipedia]. A protective layer around the egg[FBbt]. [ http://en.wikipedia.org/wiki/Vitelline_membrane ]

This is just here as a test because I lose it

Term information

Subsets

dubious_grouping

axiom lost from external ontology
  • relationship loss: part_of zygote (AAO:0010324)[AAO]
definition
  • A structure directly adjacent to the outer surface of the plasma membrane of an ovum. It is composed mostly of protein fibers, with protein receptors needed for sperm binding, binding to sperm plasma membrane receptors. The species-specificity between these receptors contributes to prevention of breeding between different species [Wikipedia]. A protective layer around the egg[FBbt].
editor note
  • TODO - consider GO CC request. GO:0030704-vitelline membrane formation considered a subclass of CC organization
external definition
  • Thin membrane enclosing and immediately adjacent to the ovum. Produced in the ovary.[AAO]
has broad synonym
  • zona pellucida - vitelline membrane
has related synonym
  • yolk sac membrane
  • m. vitellina
  • zona pellucida
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:0003125