Aspartic acid asp d HOOC-CH2-CH(NH2)-COOH
Cysteine cys c HS-CH2-CH(NH2)-COOH
Glutamine gln q H2N-CO-(CH2)2-CH(NH2)-COOH
Glutamic acid glu e HOOC-(CH2)2-CH(NH2)-COOH
Glycine gly g NH2-CH2-COOH
Histidine his h NH-CH=N-CH=C-CH2-CH(NH2)-COOH
Alanine ala a CH3-CH(NH2)-COOH
Arginine arg r HN=C(NH2)-NH-(CH2)3-CH(NH2)-COOH
Asparagine asn n H2N-CO-CH2-CH(NH2)-COOH