Table 1 The number of ‘ion-amino acid’ pairs. The amino acids are grouped based on side chain properties
From: IDPM: an online database for ion distribution in protein molecules
Non-polar amino acid | Polar amino acid without charge | Amino acid with positive charge | Amino acid with negative charge | |
|---|---|---|---|---|
Number of observed pairs of ion-amino acid | ALA: 3284 | ASN: 2318 | ARG: 2478 | ASP: 6541 |
ILE: 2639 | CYS: 30081 | HIS: 12547 | GLU: 5416 | |
LEU: 3074 | GLN: 2082 | LYS: 3854 | ||
MET: 986 | GLY: 6543 | |||
PHE: 2081 | SER: 3372 | |||
PRO: 1912 | THR: 2973 | |||
TRP: 514 | TYR: 1803 | |||
VAL: 3250 | ||||
Average | 2218 | 7110 | 6293 | 5979 |