The chemical reactions involving any of the vitamin A compounds, retinol, retinal (retinaldehyde) and retinoic acid, all of which are derivatives of beta-carotene.

The formation from simpler components of the Mo-molybdopterin cofactor, essential for the catalytic activity of some enzymes. The cofactor consists of a mononuclear molybdenum (Mo) ion coordinated by one or two molybdopterin ligands.

The chemical reactions involving any member of a large group of derivatives or analogs of porphyrin. Porphyrins consists of a ring of four pyrrole nuclei linked each to the next at their alpha positions through a methine group.

The formation from simpler components of any member of a large group of derivatives or analogs of porphyrin. Porphyrin consists of a ring of four pyrrole nuclei linked each to the next at their alpha positions through a methine group.

The chemical reactions involving isoprenoid compounds, isoprene (2-methylbuta-1,3-diene) or compounds containing or derived from linked isoprene (3-methyl-2-butenylene) residues.

The chemical reactions involving terpenoids, any member of a class of compounds characterized by an isoprenoid chemical structure and including derivatives with various functional groups.

The synthesis from simpler components of hydrocarbons that make up the cuticle, the outer layer of some animals and plants, which acts to prevent water loss.

The chemical reactions involving aromatic compounds, any organic compound characterized by one or more planar rings, each of which contains conjugated double bonds and delocalized pi electrons.

The formation from simpler components of eye pigments, any general or particular coloring matter in living organisms, found or utilized in the eye.

The formation from simpler components of ommochromes, any of a large group of natural polycyclic pigments commonly found in the Arthropoda, particularly in the ommatidia of the compound eye.

The formation from simpler components of pteridine, pyrazino(2,3-dipyrimidine), the parent structure of pterins and the pteroyl group.