Table 7.

The most correlated properties in AAindex1 to the top component of PCA.

PCA	AAindex1	Data description
1	NADH010104	Hydropathy scale based on self-information values in the two-state model (20% accessibility) (Naderi-Manesh et al., 2001)
2	RADA880103	Transfer free energy from vap to chx (Radzicka-Wolfenden, 1988)
3	NADH010107	Hydropathy scale based on self-information values in the two-state model (50% accessibility) (Naderi-Manesh et al., 2001)
4	RICJ880112	Relative preference value at C3 (Richardson-Richardson, 1988)
5	KHAG800101	The Kerr-constant increments (Khanarian-Moore, 1980)
6	RICJ880113	Relative preference value at C2 (Richardson-Richardson, 1988)
7	PRAM820103	Correlation coefficient in regression analysis (Prabhakaran-Ponnuswamy, 1982)

The first column denotes the top components in PCA calculation; the second column denotes the property accessions in AAindex1 dataset.