Alanine (Ala)
Arginine (Arg)
Asparagine (Asn)
Aspartic acid (Asp)
Cystine
Glutamic acid (Glu)
Glutamine (Gln)
Histidine (His)
Isoleucine (Ile)
Leucine (Leu)
Lysine (Lys)
Methionine (Met)
Phenylalanine (Phe)
Proline (Pro)
Serine (Ser)
Threonine (Thr)
Tryptophan (Trp)
Tyrosine (Tyr)
Valine (Val)