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Table 5 Classification of targets’ physical and chemical properties

From: SMFF-DTA: using a sequential multi-feature fusion method with multiple attention mechanisms to predict drug-target binding affinity

Physicochemical properties

Amino acid

Hydrophobic (nonpolar)

A, C, G, I, L, M, V, F, W

Hydrophilic (polar)

S, T, N, Q, P, U

Acidic (negatively charged)

D, E

Basic (positively charged)

K, R, H

Aromatic

F, W, Y

Sulfur-containing

C, M

Nonstandard

X, Z, O