an essential amino acid found in proteins; occurs especially in gelatin and casein
An essential amino acid. It is often added to animal feed.
[Greek] A diamino-acid, constituent of some plant proteins, a dietary factor, and cleavage product of certain animal proteins; C6H14O2N2.
A base, C6H14N2O2, or diamido-caproic acid produced by the decomposition of proteids.