concomitantly , the protein component ( 7 to 20 % ) was shown to contain the following amino acids : aspartic acid , threonine , serine glutamic acid , proline , glycine , alanine , valine , methionine , isoleucine , leucine , tyrosine , phenylalanine , lysine , histidine , and arginine .
C0002520
amino acids
C0017890
glycine