The chemical reactions and pathways resulting in many of the chemical changes of compounds that are not necessarily required for growth and maintenance of cells, and are often unique to a taxon. In multicellular organisms secondary metabolism is generally carried out in specific cell types, and may be useful for the organism as a whole. In unicellular organisms, secondary metabolism is often used for the production of antibiotics or for the utilization and acquisition of unusual nutrients.

The chemical reactions and pathways resulting in the formation of melanins, pigments largely of animal origin. High molecular weight polymers of indole quinone, they are irregular polymeric structures and are divided into three groups: allomelanins in the plant kingdom and eumelanins and phaeomelanins in the animal kingdom.

The chemical reactions and pathways involving biological pigments e.g. melanin, occurring as part of the development of an organ or organism.

The chemical reactions and pathways resulting in the formation of a pigment, any general or particular coloring matter in living organisms, e.g. melanin.

The chemical reactions and pathways resulting in the formation of polyketides, any of a diverse group of natural products synthesized via linear poly-beta-ketones, which are themselves formed by repetitive head-to-tail addition of acetyl (or substituted acetyl) units indirectly derived from acetate (or a substituted acetate) by a mechanism similar to that for fatty acid biosynthesis but without the intermediate reductive steps.

The chemical reactions and pathways resulting in the formation of polyketides, any of a diverse group of natural products synthesized via linear poly-beta-ketones, which are themselves formed by repetitive head-to-tail addition of acetyl (or substituted acetyl) units indirectly derived from acetate (or a substituted acetate) by a mechanism similar to that for fatty acid biosynthesis but without the intermediate reductive steps.

The chemical reactions and pathways resulting in the formation of secondary metabolites, the compounds that are not necessarily required for growth and maintenance of cells, and are often unique to a taxon.

The chemical reactions and pathways resulting in the formation of sterigmatocystin, a carcinogenic mycotoxin produced in high yields by strains of the common molds.

The chemical reactions and pathways resulting in the formation of emericellamide.

The chemical reactions and pathways resulting in the formation of o-orsellinic acid.

The chemical reactions and pathways resulting in the formation of naphtho-gamma-pyrone.

The chemical reactions and pathways resulting in the formation of monodictyphenone.

The chemical reactions and pathways resulting in the formation of a fatty acid, any of the aliphatic monocarboxylic acids that can be liberated by hydrolysis from naturally occurring fats and oils. Fatty acids are predominantly straight-chain acids of 4 to 24 carbon atoms, which may be saturated or unsaturated; branched fatty acids and hydroxy fatty acids also occur, and very long chain acids of over 30 carbons are found in waxes.

The chemical reactions and pathways resulting in the formation of toxin, a poisonous compound (typically a protein) that is produced by cells or organisms and that can cause disease when introduced into the body or tissues of an organism.

The set of specific processes that generate the ability of an organism to induce an abnormal, generally detrimental state in another organism.

The chemical reactions and pathways resulting in many of the chemical changes of compounds that are not necessarily required for growth and maintenance of cells, and are often unique to a taxon. In multicellular organisms secondary metabolism is generally carried out in specific cell types, and may be useful for the organism as a whole. In unicellular organisms, secondary metabolism is often used for the production of antibiotics or for the utilization and acquisition of unusual nutrients.

The aggregation, arrangement and bonding together of a set of components to form an asexual spore wall, the specialized envelope lying outside the cell membrane of a spore derived from an asexual process. Examples of this process are found in Bacterial and Fungal species.

Activation of an amino acid for incorporation into a peptide by a nonribosomal process, catalyzed by subunits of nonribosomal peptide synthase. The amino acid is adenylated at its carboxylate group (ATP-dependent) then transferred to the thiol group of an enzyme-bound phosphopantetheine cofactor.

Any process that results in a change in state or activity of the symbiont or its cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of detecting molecules of its host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction.

The chemical reactions and pathways resulting in the formation of violaceol I.

The chemical reactions and pathways resulting in the formation of violaceol II.

The chemical reactions and pathways resulting in the formation of F-9775A.

The chemical reactions and pathways resulting in the formation of F-9775B.