Descriptors of ST-scales for 20 coded amino acids.
AA	Abbr.	ST1 a	ST2	ST3	ST4	ST5	ST6	ST7	ST8
Ala	A	-1.552	-0.791	-0.627	0.237	-0.461	-2.229	0.283	1.221
Arg	R	-0.059	0.731	-0.013	-0.096	-0.253	0.300	1.256	0.854
Asn	N	-0.888	-0.057	-0.651	-0.214	0.917	0.164	-0.140	-0.166
Asp	D	-0.907	-0.054	-0.781	-0.248	1.120	0.101	-0.245	-0.075
Cys	C	-1.276	-0.401	0.134	0.859	-0.196	-0.720	0.639	-0.857
Gln	Q	-0.622	0.228	-0.193	-0.105	0.418	0.474	0.172	0.408
Glu	E	-0.629	0.390	-0.380	-0.366	0.635	0.514	0.175	0.367
Gly	G	-1.844	-0.018	-0.184	0.573	-0.728	-3.317	0.166	2.522
His	H	-0.225	0.361	0.079	-1.037	0.568	0.273	1.208	-0.001
Ile	I	-0.785	-1.010	-0.349	-0.097	-0.402	1.091	-0.139	-0.764
Leu	L	-0.826	-0.379	0.038	-0.059	-0.625	1.025	-0.229	-0.129
Lys	K	-0.504	0.245	0.297	-0.065	-0.387	1.011	0.525	0.553
Met	M	-0.693	0.498	0.658	0.457	-0.231	1.064	0.248	-0.778
Phe	F	-0.019	0.024	1.080	-0.220	-0.937	0.570	-0.357	0.278
Pro	P	-1.049	-0.407	-0.067	-0.066	-0.813	-0.890	0.021	-0.894
Ser	S	-1.343	-0.311	-0.917	-0.049	0.549	-1.533	0.166	0.280
Thr	T	-1.061	-0.928	-0.911	-0.063	0.538	-0.775	-0.147	-0.717
Trp	W	0.853	0.039	0.260	-1.163	0.160	-0.202	1.010	0.195
Tyr	Y	0.308	0.569	1.100	-0.464	-0.144	-0.354	-1.099	0.162
Val	V	-1.133	-0.893	-0.325	0.303	-0.561	-0.175	-0.020	-0.311
a The 8 principal component scores of ST-scales are derived from 827 structural variables of 167 amino acids by PCA.
References [1] L. Yang, M. Shu, K. W. Ma, H. Mei, Y. J. Jiang, Z. L. Li, ST-scale as a novel amino acid descriptor and its application in QSAM of peptides and analogues, Amino Acids, 38 (2010) 805-816.