No.	Descriptor	Group	# Features
1	Amino acid composition	Amino acid composition	20
2	Dipeptide composition		400
3	Tripeptide composition		8000
4	Normalized Moreau-Broto	Autocorrelation	240^a
5	Moran		240^a
6	Geary		240^a
7	Composition	CTD	21
8	Transition		21
9	Distribution		105
10	Conjoint Triad	Conjoint Triad	343
11	Sequence-order-coupling number	Quasi-sequence-order	60^a
12	Quasi-sequence-order descriptors	Quasi-sequence-order	100^a
13	Type I	Pseudo-amino acid composition	50
14	Type II	Pseudo-amino acid composition	80
15	Principal components analysis (amino acid properties based)	Proteochemometric descriptors	175^b
16	Principal components analysis (2D and 3D molecular descriptors based)		4025^b
17	Factor analysis (amino acid properties based)		175^b
18	Factor analysis (2D and 3D molecular descriptors based)		4025^b
19	Multidimensional scaling (amino acid properties based)		175^b
20	Multidimensional scaling (2D and 3D molecular descriptors based)		4025^b
21	BLOSUM and PAM matrix-derived descriptors		175^b
22	PSSM profile	PSSM	-