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Table 2 The six groups of the 20 amino acids

From: DRACP: a novel method for identification of anticancer peptides

Groups Amino acids
Strongly hydrophilic R, D, E, N, Q, K, H
Strongly hydrophobic L, I, A, V, M, F
Weakly hydrophilic
Weakly hydrophobic
S, T, Y, W
Proline P
Glycine G
Cysteine C