| Compound | Description |
|---|
| taurine | A conditionally essential nutrient, important during mammalian development. It is present in milk but is isolated mostly from ox bile and strongly conjugates bile acids. |
| Glutathione | A tripeptide with many roles in cells. It conjugates to drugs to make them more soluble for excretion, is a cofactor for some enzymes, is involved in protein disulfide bond rearrangement and reduces peroxides. |
| Acetylcholine | A neurotransmitter found at neuromuscular junctions, autonomic ganglia, parasympathetic effector junctions, a subset of sympathetic effector junctions, and at many sites in the central nervous system. |
| betaine hydrochloride | |
| choline | A basic constituent of lecithin that is found in many plants and animal organs. It is important as a precursor of acetylcholine, as a methyl donor in various metabolic processes, and in lipid metabolism. |
| cysteine | A thiol-containing non-essential amino acid that is oxidized to form CYSTINE. |
| methionine | A sulfur-containing essential L-amino acid that is important in many body functions. |
| ornithine | An amino acid produced in the urea cycle by the splitting off of urea from arginine. |
| glycine | A non-essential amino acid. It is found primarily in gelatin and silk fibroin and used therapeutically as a nutrient. It is also a fast inhibitory neurotransmitter. |
| sarcosine | An amino acid intermediate in the metabolism of choline. |
| spermidine | A polyamine formed from putrescine. It is found in almost all tissues in association with nucleic acids. It is found as a cation at all pH values, and is thought to help stabilize some membranes and nucleic acid structures. It is a precursor of spermine. |
| spermine | A biogenic polyamine formed from spermidine. It is found in a wide variety of organisms and tissues and is an essential growth factor in some bacteria. It is found as a polycation at all pH values. Spermine is associated with nucleic acids, particularly in viruses, and is thought to stabilize the helical structure. |
| Cystathionine | Sulfur-containing amino acid formed as an intermediate in the conversion of METHIONINE to CYSTEINE. |
| dimethylglycine | metabolic product of calcium pangamate; mutagen when mixed with nitrite; RN given refers to parent cpd |
| putrescine | A toxic diamine formed by putrefaction from the decarboxylation of arginine and ornithine. |
| hypotaurine | intermediate in production of taurine in the liver; structure |
| s-adenosylhomocysteine | 5'-S-(3-Amino-3-carboxypropyl)-5'-thioadenosine. Formed from S-adenosylmethionine after transmethylation reactions. |
| homocysteine | A thiol-containing amino acid formed by a demethylation of METHIONINE. |