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Zona Pellucida Glycoproteins
Membrane glycoproteins that constitute the ZONA PELLUCIDA in mammals and function in the recognition and binding of SPERMATOZOA.
Year introduced: 2017 (1981)
Zona Pellucida
A tough transparent membrane surrounding the OVUM. It is penetrated by the sperm during FERTILIZATION.
Year introduced: 1991(1975)
Sperm-Ovum Interactions
Interactive processes between the oocyte (OVUM) and the sperm (SPERMATOZOA) including sperm adhesion, ACROSOME REACTION, sperm penetration of the ZONA PELLUCIDA, and events leading to FERTILIZATION.
Year introduced: 1985(1975)
ZP4 protein, human [Supplementary Concept]
RefSeq NM_021186
Date introduced: September 23, 1993
Cetraspora pellucida [Supplementary Concept]
Date introduced: October 1, 2020
zp3b protein, zebrafish [Supplementary Concept]
a zona pellucida protein; RefSeq NM_131696
Date introduced: July 10, 2004
ZPB protein, mouse [Supplementary Concept]
RefSeq NR_027813
Date introduced: September 30, 2016
ZP2 protein, human [Supplementary Concept]
RefSeq NM_003460
Zp4 protein, rat [Supplementary Concept]
RefSeq NM_172330
ZP3 protein, human [Supplementary Concept]
RefSeq NM_007155
Acrosome Reaction
Changes that occur to liberate the enzymes of the ACROSOME of a sperm (SPERMATOZOA). Acrosome reaction allows the sperm to penetrate the ZONA PELLUCIDA and enter the OVUM during FERTILIZATION.
Year introduced: 1999
Cleavage Stage, Ovum
The earliest developmental stage of a fertilized ovum (ZYGOTE) during which there are several mitotic divisions within the ZONA PELLUCIDA. Each cleavage or segmentation yields two BLASTOMERES of about half size of the parent cell. This cleavage stage generally covers the period up to 16-cell MORULA.
Year introduced: 1980
Blastomeres
Undifferentiated cells resulting from cleavage of a fertilized egg (ZYGOTE). Inside the intact ZONA PELLUCIDA, each cleavage yields two blastomeres of about half size of the parent cell. Up to the 8-cell stage, all of the blastomeres are totipotent. The 16-cell MORULA contains outer cells and inner cells.
ZPBP1 protein, human [Supplementary Concept]
RefSeq NM_007009
Date introduced: May 17, 2012
QSM protein, Drosophila [Supplementary Concept]
GPI-anchored zona pellucida protein involved in light input to the circadian clock; RefSeq NM_143792
Date introduced: September 7, 2011
Zpbp protein, rat [Supplementary Concept]
a zona pellucida binding protein; GenBank BC079315
Date introduced: November 3, 2009
Sp38 protein, mouse [Supplementary Concept]
a zona pellucida binding protein; GenBank D17569
Date introduced: October 30, 2009
ZPLD1 protein, human [Supplementary Concept]
RefSeq NM_175056
Date introduced: December 1, 2008
Pieczenik peptide sequence 2 [Supplementary Concept]
synthetic peptide that binds human spermatozoa-zona pellucida
Date introduced: December 1, 2006
Pieczenik peptide sequence 1 [Supplementary Concept]