The amino acid metabolism between the organs can work only if we could have a transport molecule, which is water-soluble. Ammonia is not really the best option due to the fact that it influences in a bad way the blood pH levels, the instead water-soluble amino acid will be the solution which is the GLUTAMINE. 100 % of the food supplement cases are L-GLN is there, to provide the transportable form of nitrogen.
Intestines utilize GLU, GLN, ASN, ASP and release NH4+, ALA and CITRULLINE into the portal vein (Figure 1).
Muscle releases ALA and GLN. Muscle is the place of the high capacity transamination of the branched-chain amino acids.
The brain uses Glu,