l-glutamine

L-Glutamine (L-Glutamic acid 5-amide) , a non-essential amino acid, is synthesized from glutamic acid and ammonia.

L-Alanyl-L-glutamine (Ala-Gln), a dipeptide composed of alanine and Gln, is an alternative supplement to L-glutamine in the production of biopharmaceuticals with better solubility and stability than glutamine (Gln).

Aceglutamide (N2-Acetylglutamine) is an acetyl derivative of the amino acid L-glutamine, used to improve memory.

Phenylacetylglutamine (NSC 203800)is a normal constituent of human urine, but other mammals such as the dog, cat, rat, monkey, sheep, and horse do not excrete this compound. Phenylacetylglutamine is a major nitrogenous metabolite that accumulates in uremia. Phenylacetylglutamine also is a microbial metabolite found in Christensenellaceae, Lachnospiraceae, and Ruminococcaceae.

5'-Guanylic acid disodium salt (GMP-5) belongs to the class of organic compounds known as purine ribonucleoside monophosphates. In particular, L-Glutamic acid and guanosine monophosphate can be biosynthesized from xanthylic acid and L-glutamine; which is catalyzed by the enzyme GMP synthase [glutamine-hydrolyzing]. In addition, Guanosine triphosphate and guanosine monophosphate can be biosynthesized from diguanosine tetraphosphate; which is catalyzed by the enzyme bis(5'-nucleosyl)-tetraphosphatase [asymmetrical]. In humans, guanosine monophosphate is involved in the kanamycin action pathway, the telithromycin action pathway, the tobramycin action pathway, and the erythromycin action pathway. Guanosine monophosphate is also involved in several metabolic disorders, some of which include the AICA-ribosiduria pathway, adenosine deaminase deficiency, adenine phosphoribosyltransferase deficiency (aprt), and the 2-hydroxyglutric aciduria (D and L form) pathway. Outside of the human body, guanosine monophosphate can be found in a number of food items such as onion-family vegetables, millet, chinese water chestnut, and red rice. This makes guanosine monophosphate a potential biomarker for the consumption of these food products.

Histidine (abbreviated as His or H) is an alpha-amino acid. The L-isomer is one of the 22 proteinogenic amino acids, i.e., the building blocks of proteins. It is classified as a charged, polar because of the hydrophilic nature of the imidazole side chain.

L-Pyroglutamic acid (pidolic acid), a cyclized derivative of the L-GLUTAMIC ACID, can elevate blood levels. This function may be associated with problems of GLUTATHIONE or GLUTAMINE metabolism.

L-Citrulline is an amino acid derived from ornithine in the catabolism of proline or glutamate and glutamine, or from l-arginine via arginine-citrulline pathway.