the amino acids asx ( aspartic acid or asparagine ) , alanine , glycine , glx ( glutamic acid or glutamine ) , and serine are the most abundant at 13.4 % , 12.3 % , 12.1 % , 9.3 % , and 9.3 % of the residues , respectively .
C0002520
amino acids
C0017890
glycine