OBSOLETE. Any constituent part of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.

OBSOLETE. Any constituent part of a chromosome, a structure composed of a very long molecule of DNA and associated proteins (e.g. histones) that carries hereditary information.

OBSOLETE. Any constituent part of the nucleus, a membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated.

OBSOLETE. Any constituent part of a mitochondrion, a semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

The removal of the sulfonate group from 2-aminobenzenesulfonate, an aromatic sulfonate used in organic synthesis and in the manufacture of various dyes and medicines.

The chemical reactions and pathways involving 2-aminobenzenesulfonate, aniline-o-sulfonic acid, an aromatic sulfonate used in organic synthesis and in the manufacture of various dyes and medicines.

The chemical reactions and pathways resulting in the formation of ectoine (1,4,5,6-tetrahydro-2-methyl-4-pyrimidinecarboxylic acid), a tetrahydropyrimidine commonly synthesized by halophilic bacteria.

The chemical reactions and pathways involving ectoine (1,4,5,6-tetrahydro-2-methyl-4-pyrimidinecarboxylic acid), a tetrahydropyrimidine commonly synthesized by halophilic bacteria.

Any process which produces the amino acid proline from derivatives of it, without de novo synthesis.

The chemical reactions and pathways resulting in the formation of proline (pyrrolidine-2-carboxylic acid), a chiral, cyclic, nonessential alpha-amino acid found in peptide linkage in proteins.

Any process which produces an amino acid from derivatives of it, without de novo synthesis.

The chemical reactions and pathways resulting in the breakdown of arginine into other compounds, including proline.

The chemical reactions and pathways resulting in the formation of beta-alanine (3-aminopropanoic acid), an achiral amino acid and an isomer of alanine. It occurs free (e.g. in brain) and in combination (e.g. in pantothenate) but it is not a constituent of proteins.

The chemical reactions and pathways resulting in the formation of amino acids, organic acids containing one or more amino substituents.

The chemical reactions and pathways resulting in the breakdown of beta-alanine (3-aminopropanoic acid), an achiral amino acid and an isomer of alanine. It occurs free (e.g. in brain) and in combination (e.g. in pantothenate) but it is not a constituent of proteins.

The chemical reactions and pathways resulting in the breakdown of beta-alanine into other compounds, including L-alanine.

The chemical reactions and pathways involving L-alanine, the L-enantiomer of 2-aminopropanoic acid, i.e. (2S)-2-aminopropanoic acid.

OBSOLETE. Any constituent part of the extracellular matrix, the structure lying external to one or more cells, which provides structural support for cells or tissues; may be completely external to the cell (as in animals) or be part of the cell (as often seen in plants).

The chemical reactions and pathways resulting in the breakdown of beta-alanine into other compounds, including mevalonate semialdehyde, by transamination.

OBSOLETE. Any constituent part of the extracellular region, the space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers constituent parts of the host cell environment outside an intracellular parasite.