The 20 Major Amino Acids Found in Organisms

Aspartate

(Asp, D) | Electrically charged side chain (acidic)

Glutamate

(Glu, E) | Electrically charged side chain (acidic)

Lysine

(Lys, K) | Electrically charged side chain (basic)

Arginine

(Arg, R) | Electrically charged side chain (basic)

Histidine

(His, H) | Electrically charged side chain (basic)

Serine

(Ser, S) | Polar side chain

Threonine

(Thr, T) | Polar side chain

Tyrosine

(Tyr, Y) | Polar side chain

Asparagine

(Asn, N) | Polar side chain

Glutamine

(Gln, Q) | Polar side chain

Glycine

(Gly, G) | Nonpolar side chain

Alanine

(Ala, A) | Nonpolar side chain

Valine

(Val, V) | Nonpolar side chain

Leucine

(Leu, L) | Nonpolar side chain

Isoleucine

(Ile, I) | Nonpolar side chain

Methionine

(Met, M) | Nonpolar side chain

Cysteine

(Cys, C) | Nonpolar side chain

Phenylalanine

(Phe, F) | Nonpolar side chain

Tryptophan

(Trp, W) | Nonpolar side chain

Proline

(Pro, P) | Nonpolar side chain