1. Amino acid Physical-chemical property Database. URL http://www.rfdn.org/bioinfo/APDbase/index.html (last assessed January 22, 2014).
2. Protein Data Bank. URL http://www.rcsb.org/pdb/home/home.do (last assessed January 22, 2014).
3. Substitution Matrix. URL ftp://ftp.ncbi.nih.gov/blast/matrices (last assessed January 22, 2014).
4. Sequence-based prediction of protein solubility;Agostini;J. Mol. Biol.,2012
5. Principal eigenvector of contact matrices and hydrophobicity profiles in proteins;Bastolla;Proteins: Struct., Funct., Bioinformat.,2005