The discharge, by sperm, of a single, anterior secretory granule following the sperm's attachment to the zona pellucida of the oocyte. The process begins with the fusion of the outer acrosomal membrane with the sperm plasma membrane and ends with the exocytosis of the acrosomal contents into the zona pellucida.

The binding and fusion of a sperm, with the plasma membrane of the oocyte as part of the process of single fertilization. In sperm with flagella, binding occurs at the posterior (post-acrosomal) region of the sperm head.

The infiltration by sperm of the zona pellucida to reach the oocyte. The process involves digestive enzymes from a modified lysosome called the acrosome, situated at the head of the sperm.

The directed movement of an ammonium ion from outside of a cell, across the plasma membrane and into the cytosol.

The process in which ammonium is transported across a membrane. Ammonium is the cation NH4+.

The merging of two pronuclei in a fertilized egg to fuse and produce a single zygotic genome.

The process in which the egg becomes metabolically active, initiates protein and DNA synthesis and undergoes structural changes to its cortex and/or cytoplasm.

OBSOLETE. Formation and development of an embryo and its organized structures.

A cell cycle process that modulates the rate or extent of the progression through the syncytial blastoderm mitotic cell cycle.

A cell cycle process that modulates the rate or extent of the progression through the preblastoderm mitotic cell cycle.

Catalysis of the transfer of an alpha-L-fucosyl residue from GDP- beta-L-fucose to the serine hydroxy group of a protein acceptor.

The cross-linking of a cysteine residue to an L-phenylalanine residue to form 2-(S-L-cysteinyl)-D-phenylalanine.

The modification of peptidyl-phenylalanine.

The cross-linking of a cysteine residue to an L-phenylalanine residue to form 2-(S-L-cysteinyl)-L-phenylalanine.

The racemization of peptidyl-L-threo-threonine at the alpha-carbon to form D-allo-threonine. This is coupled with the formation of the cross-link 2-(S-L-cysteinyl)-D-allo-threonine.

The post-translational cross-linking of a cysteine residue to an L-threonine residue to form 2-(S-L-cysteinyl)-D-allo-threonine.

Any process that stops, prevents, or reduces the frequency, rate or extent of the directed movement of a neurotransmitter into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Any process that modulates the frequency, rate or extent of the directed movement of a neurotransmitter into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Catalysis of the transfer of an L-fucosyl group from GDP-beta-L-fucose to an acceptor molecule to form an alpha-(1->6) linkage.

The directed movement of borate from inside of a cell, across the plasma membrane and into the extracellular region.