Table 1.

The classification of protein properties

Property type	Category	Amino acid
Hydrophobicity	Polar	R, K, E, D, Q, N
	Neutral	G, A, S, T, P, H, Y
	Hydrophobic	C, V, L, I,M, F,W
Polarizability	0-0.108	G, A, S, D, T
	0.128-0.186	C, P, N, V, E, Q, I, L
	0.219-0.409	K, M, H, F, R, Y, W
NVVa	0-2.78	G, A, S, C, T, P, D
	2.95-4.0	N, V, E, Q, I, L
	4.43-8.08	M, H, K, F, R, Y, W
Polarity	4.9-6.2	L, I, F, W, C, M, V, Y
	8.0-9.2	P, A, T, G, S
	10.4-13.0	H, Q, R, K, N, E, D
SSPb	Helix	Predicted by SSpro [31]
	Strand
	Coil
Solvent	Buried	Predicted by ACCpro [32]
	Exposed

^anormalized van der Waals volume; ^bsecondary structure propensity.