The chemical reactions involving monosaccharides, the simplest carbohydrates. They are polyhydric alcohols containing either an aldehyde or a keto group and between three to ten or more carbon atoms. They form the constitutional repeating units of oligo- and polysaccharides.

Catalysis of the reaction: arachidonate + O2 = (6E,8Z,11Z,14Z)-(5S)-5-hydroperoxycosa-6,8,11,14-tetraenoate.

Catalysis of the reaction: N1-acetylspermine + O2 + H2O = N1-acetylspermidine + 3-aminopropanal + H2O2.

Catalysis of the reaction: arachidonate + O2 = (5Z,8Z,10E,14Z)-(12S)-12-hydroperoxyicosa-5,8,10,14-tetraenoate.

Catalysis of the reaction: L-arginine + H2O = L-ornithine + urea.

Catalysis of the reaction: ATP + L-citrulline + L-aspartate = AMP + diphosphate + (Nw-L-arginino)succinate.

Catalysis of the reaction: NADH + a quinone = NAD+ + a quinol.

Any process that modulates the frequency, rate or extent of the introduction of virus particles into the cell.

Catalysis of the reaction: N-(L-arginino)succinate = fumarate + L-arginine.

Interacting selectively with an opsonin, such as a complement component or antibody, deposited on the surface of a bacteria, virus, immune complex, or other particulate material.

negative regulation of virion penetration

Any process that stops, prevents or reduces the rate of the introduction of virus particles into the cell.

Combining with an opsonin to initiate a change in cell activity.

The chemical reactions involving pigment, any general or particular coloring matter in living organisms, e.g. melanin.

Catalysis of the reaction: L-tryptophan = tryptamine + CO2.

Any process that modulates the frequency, rate or extent of endocytosis.

Interacting selectively with any component or product of the complement cascade.

Any process that modulates the frequency, rate or extent of the formation of a daughter centriole of an existing centriole.

The chemical reactions involving eye pigments, any general or particular coloring matter in living organisms, found or utilized in the eye.

Catalysis of the reaction: acetyl-CoA + an aralkylamine = CoA + an N-acetylaralkylamine.