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Table 4 Physicochemical properties used to represent a protein for predicting plastids and their types using SVM.

From: Identification and characterization of plastid-type proteins from sequence-attributed features using machine learning

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