Preferred Label : vitelline membrane;
Uberon 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].;
Uberon related term : yolk sac membrane; zona pellucida;
Uberon broad term : zona pellucida - vitelline membrane;
Uberon Homology note : 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];
Origin ID : 0003125;
Automatic exact mappings (from CISMeF team)
- surrounded by
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].
