Table 2.

The chemical classes to which the 20 amino acids belong, based on Wong et al. (2007)

Group name	Amino Acids
Sulfur	C, M
Aliphatic 1	A, G, P
Aliphatic 2	I, L, V
Acid	D, E
Base	H, K, R
Aromatic	F, W, Y
Amide	N, Q
Small hydroxy	S, T