(R39): A protein evolution model with independent sites that reproduces site-specific amino acid distributions from the Protein Data Bank
U. Bastolla, M. Porto, H.E. Roman, and M. Vendruscolo, BMC Evol. Biol. 6, 43 (2006) (21 pages).
The structural profile, as discussed in this paper, can be downloaded from the SLOTH homepage for each structure of the PDB.