lysine ( 2 ) , arginine ( 1 ) , aspartic acid ( 1 ) , threonine ( 1 ) , serine ( 1 ) , glutamic acid ( 1 ) , glycine ( 2 ) , alanine ( 2 ) , valine ( 2 ) , leucine ( 2 ) , and isoleucine ( 1 ) , form a single peptide with glycine as the sole nh ( 2 ) -terminal amino acid .
C0017890
glycine
C0002520
amino acid