Les 20 acides aminés qui composent les protéines sont : la sérine (Ser,S), la thréonine (Thr,T), la cystéine (Cys,C), l'asparagine (Asn,N), la glutamine (Gln,Q) et la tyrosine (Tyr , Y), Glycine (Gly,G), Alanine (Ala,A), Valine (Val,V), Leucine (Leu,L), Isoleucine (Ile,I), Méthionine (Met,M), Proline (Pro, P ), phénylalanine (Phe,F) et tryptophane (Trp,W), acide aspartique (Asp,D) et acide glutamique (Glu,E), lysine (Lys,K), arginine (Arg,R) et histidine (His , h)
[1 ] Alanine (Ala,A)
[2 ] Acide glutamique (Glu,E)
[3 ] Leucine (Leu,L)
[4 ] Sérine (Ser,S)
[5 ] Arginine (Arg,R)
[6 ] Glutamine (Gln,Q)
[7 ] Lysine (Lys,K)
[8 ] Thréonine (Thr,T)
[9 ] Asparagine (Asn,N)
[10 ] Glycine (Gly,G)
[11 ] Méthionine (Met,M)
[12 ] Tryptophane (Trp,W)
[13 ] Acide aspartique (Asp,D)
[14 ] Histidine (His,H)
[15 ] Phénylalanine (Phe,F)
[16 ] Tyrosine (Tyr,Y)
[17 ] Cystéine (Cys,C)
[18 ] Isoleucine (Ile,I)
[19 ] Proline (Pro, P)
[20 ] Valine (Val,V)