Table 5.
Parameters of 16 amino acid descriptors.
| Descriptor | No. of Physicochemical Property | No. of Extracted Variable | Scope of Variable |
|---|---|---|---|
| Z-scale [25] | 29 | 3 | Electronic property, steric property and hydrophobic property |
| 5Z-scale [26] | 26 | 5 | Electronic property, steric property and hydrophobic property |
| DPPS [27] | 119 | 10 | Electronic property, steric property, hydrophobic property and hydrogen bond |
| MS-WHIM [28] | 36 | 3 | Surface charge distribution, size and charge over shape dependence |
| ISA-ECI [29] | / | 2 | Isotropic surface area and electronic charge index |
| VHSE [30] | 50 | 8 | Electronic property, steric property and hydrophobic property |
| FASGAI [31] | 335 | 6 | Hydrophobic property, alpha and turn property, bulky property, electronic property, compositional characteristics, local flexibility |
| VSW [32] | 99 | 9 | Molecular size, shape, symmetry and atom distribution |
| T-scale [33] | 67 | 5 | Topological property |
| ST-scale [34] | 827 | 8 | Molecular constitutional, topological, geometrical, hydrophobic, electronic and steric property |
| E-scale [35] | 237 | 5 | Hydrophobic property, size, preferences for amino acids to occur in α-helices, number of degenerate triplet codons and the frequency of occurrence of amino acid residues in β-strands |
| V-scale [36] | / | 3 | Van Der Wall’s volume, net charge index and hydrophobic parameter of side chains |
| G-scale [37] | 457 | 8 | Electronic property, steric property and hydrophobic property |
| HESH [38] | 171 | 12 | Electronic property, steric property, hydrophobic property and hydrogen bond |
| HSEHPCSV [39] | 95 | 12 | Hydrophobic, steric, electronic properties and hydrogen bond |