Table 4 Physicochemical properties used to represent a protein for predicting plastids and their types using SVM.
Sr. No. | Physicochemical property | Amino acids | # feature |
|---|---|---|---|
1 | Charged residues | D, R, E, K, H | 1 |
2 | Hydrophilic (polar) and neutral | N, Q, S, T, Y | 1 |
3 | Basic polar or Positively charged | H, K, R | 1 |
4 | Acidic polar or Negatively charged | D, E | 1 |
5 | Aliphatic | A, G, I, L, V | 1 |
6 | Aromatic | F, W, Y | 1 |
7 | Small | T, D, N | 1 |
8 | Tiny | G, A, S, P | 1 |
9 | Large | F, R, W, Y | 1 |
10 | Hydrophobic (non-polar) and aromatic | W, F | 1 |
11 | Hydrophobic (non-polar) and neutral | A, C, G, I, L, M, F, P, W, V | 1 |
12 | Amidic (contains amide group) | N, Q | 1 |
13 | Cyclic | P | 1 |
14 | Hydroxylic | S, T | 1 |
15 | Sulfur-containing | C, M | 1 |
16 | H-bonding | C, W, N, Q, S, T, Y, K, R, H, D, E | 1 |
17 | Acidic and their Amide | D, E, N, Q | 1 |
18 | Ionizable | D, E, H, C, Y, K, R | 1 |
19 | Forms covalent cross-link (disulfide bond) | C | 1 |
20 | Theoretical pI (isoelectric point) | - | 1 |