
Apart from single amino acid frequencies one can also calculate so called amino acid dipeptide frequency. 
There is 400 possibilites (441 if we consider Xaa as additional 21st amino acid representing all non-standard or unknown amino acids).
Thus, if the dipeptides would be present randomly in proteins each amino acid dipeptide should be present with 0.25% frequency. As it is not the case in the nature, for better visablity all more than expected dipepetides are marked by red, and those which are underrepresented are marked by blue in the table.
All values are presented as per milles (‰), therefore need to be multiplied by 10-3.
For more information see sequence space article on Wikipedia.
| Ala | Cys | Asp | Glu | Phe | Gly | His | Ile | Lys | Leu | Met | Asn | Pro | Gln | Arg | Ser | Thr | Val | Trp | Tyr | Xaa | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ala | 4.808AlaAla: 4.808 ± 0.898  | 0.801AlaCys: 0.801 ± 0.771  | 1.603AlaAsp: 1.603 ± 0.932  | 3.205AlaGlu: 3.205 ± 1.247  | 1.603AlaPhe: 1.603 ± 0.785  | 0.801AlaGly: 0.801 ± 0.771  | 1.603AlaHis: 1.603 ± 0.932  | 4.006AlaIle: 4.006 ± 1.165  | 5.609AlaLys: 5.609 ± 2.135  | 6.41AlaLeu: 6.41 ± 3.213  | 0.0AlaMet: 0.0 ± 0.0  | 2.404AlaAsn: 2.404 ± 0.927  | 2.404AlaPro: 2.404 ± 1.222  | 1.603AlaGln: 1.603 ± 0.957  | 2.404AlaArg: 2.404 ± 1.382  | 6.41AlaSer: 6.41 ± 2.247  | 6.41AlaThr: 6.41 ± 2.518  | 0.0AlaVal: 0.0 ± 0.0  | 0.801AlaTrp: 0.801 ± 0.611  | 1.603AlaTyr: 1.603 ± 0.785  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.0CysAla: 0.0 ± 0.0  | 0.0CysCys: 0.0 ± 0.0  | 0.0CysAsp: 0.0 ± 0.0  | 0.801CysGlu: 0.801 ± 0.771  | 1.603CysPhe: 1.603 ± 1.355  | 3.205CysGly: 3.205 ± 1.315  | 0.0CysHis: 0.0 ± 0.0  | 0.0CysIle: 0.0 ± 0.0  | 0.801CysLys: 0.801 ± 0.771  | 0.801CysLeu: 0.801 ± 1.014  | 0.801CysMet: 0.801 ± 0.782  | 1.603CysAsn: 1.603 ± 1.223  | 1.603CysPro: 1.603 ± 0.785  | 0.801CysGln: 0.801 ± 0.611  | 1.603CysArg: 1.603 ± 0.896  | 0.801CysSer: 0.801 ± 0.698  | 1.603CysThr: 1.603 ± 0.853  | 1.603CysVal: 1.603 ± 1.542  | 0.0CysTrp: 0.0 ± 0.0  | 0.0CysTyr: 0.0 ± 0.0  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 2.404AspAla: 2.404 ± 1.834  | 0.0AspCys: 0.0 ± 0.0  | 0.801AspAsp: 0.801 ± 0.611  | 2.404AspGlu: 2.404 ± 1.098  | 2.404AspPhe: 2.404 ± 1.403  | 3.205AspGly: 3.205 ± 1.766  | 1.603AspHis: 1.603 ± 0.785  | 1.603AspIle: 1.603 ± 0.853  | 4.006AspLys: 4.006 ± 2.101  | 4.808AspLeu: 4.808 ± 0.872  | 0.0AspMet: 0.0 ± 0.0  | 2.404AspAsn: 2.404 ± 0.917  | 3.205AspPro: 3.205 ± 1.027  | 2.404AspGln: 2.404 ± 1.683  | 3.205AspArg: 3.205 ± 1.706  | 1.603AspSer: 1.603 ± 0.725  | 1.603AspThr: 1.603 ± 0.853  | 5.609AspVal: 5.609 ± 1.147  | 0.801AspTrp: 0.801 ± 0.611  | 1.603AspTyr: 1.603 ± 0.785  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 4.006GluAla: 4.006 ± 1.757  | 0.0GluCys: 0.0 ± 0.0  | 3.205GluAsp: 3.205 ± 1.187  | 1.603GluGlu: 1.603 ± 0.932  | 2.404GluPhe: 2.404 ± 1.222  | 2.404GluGly: 2.404 ± 1.098  | 0.801GluHis: 0.801 ± 1.014  | 0.0GluIle: 0.0 ± 0.0  | 1.603GluLys: 1.603 ± 0.957  | 4.808GluLeu: 4.808 ± 1.855  | 0.0GluMet: 0.0 ± 0.0  | 4.006GluAsn: 4.006 ± 2.216  | 3.205GluPro: 3.205 ± 0.922  | 0.801GluGln: 0.801 ± 0.771  | 1.603GluArg: 1.603 ± 1.223  | 1.603GluSer: 1.603 ± 0.979  | 0.801GluThr: 0.801 ± 0.857  | 4.006GluVal: 4.006 ± 1.834  | 0.801GluTrp: 0.801 ± 0.698  | 0.801GluTyr: 0.801 ± 0.611  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 1.603PheAla: 1.603 ± 0.785  | 1.603PheCys: 1.603 ± 1.156  | 2.404PheAsp: 2.404 ± 1.098  | 3.205PheGlu: 3.205 ± 1.13  | 0.801PhePhe: 0.801 ± 0.611  | 3.205PheGly: 3.205 ± 1.706  | 0.801PheHis: 0.801 ± 0.611  | 3.205PheIle: 3.205 ± 2.077  | 4.006PheLys: 4.006 ± 0.946  | 2.404PheLeu: 2.404 ± 1.326  | 0.801PheMet: 0.801 ± 0.611  | 2.404PheAsn: 2.404 ± 1.487  | 1.603PhePro: 1.603 ± 1.132  | 2.404PheGln: 2.404 ± 1.098  | 4.006PheArg: 4.006 ± 2.189  | 2.404PheSer: 2.404 ± 1.326  | 2.404PheThr: 2.404 ± 2.0  | 1.603PheVal: 1.603 ± 1.396  | 0.0PheTrp: 0.0 ± 0.0  | 2.404PheTyr: 2.404 ± 1.367  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 2.404GlyAla: 2.404 ± 0.9  | 1.603GlyCys: 1.603 ± 0.725  | 3.205GlyAsp: 3.205 ± 1.187  | 0.801GlyGlu: 0.801 ± 0.611  | 1.603GlyPhe: 1.603 ± 1.299  | 4.808GlyGly: 4.808 ± 1.497  | 1.603GlyHis: 1.603 ± 0.785  | 2.404GlyIle: 2.404 ± 0.644  | 5.609GlyLys: 5.609 ± 2.454  | 3.205GlyLeu: 3.205 ± 2.228  | 2.404GlyMet: 2.404 ± 1.244  | 3.205GlyAsn: 3.205 ± 1.316  | 4.006GlyPro: 4.006 ± 1.212  | 1.603GlyGln: 1.603 ± 1.542  | 1.603GlyArg: 1.603 ± 1.223  | 5.609GlySer: 5.609 ± 1.587  | 0.801GlyThr: 0.801 ± 0.771  | 3.205GlyVal: 3.205 ± 1.959  | 0.0GlyTrp: 0.0 ± 0.0  | 1.603GlyTyr: 1.603 ± 0.956  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.603HisAla: 1.603 ± 1.109  | 0.0HisCys: 0.0 ± 0.0  | 1.603HisAsp: 1.603 ± 1.218  | 0.801HisGlu: 0.801 ± 0.611  | 0.801HisPhe: 0.801 ± 0.611  | 3.205HisGly: 3.205 ± 1.096  | 0.801HisHis: 0.801 ± 0.906  | 2.404HisIle: 2.404 ± 1.301  | 0.801HisLys: 0.801 ± 0.906  | 4.006HisLeu: 4.006 ± 1.107  | 1.603HisMet: 1.603 ± 1.173  | 2.404HisAsn: 2.404 ± 1.326  | 1.603HisPro: 1.603 ± 1.223  | 1.603HisGln: 1.603 ± 1.156  | 2.404HisArg: 2.404 ± 0.986  | 2.404HisSer: 2.404 ± 1.325  | 3.205HisThr: 3.205 ± 1.634  | 3.205HisVal: 3.205 ± 1.216  | 0.0HisTrp: 0.0 ± 0.0  | 2.404HisTyr: 2.404 ± 1.326  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 0.0IleAla: 0.0 ± 0.0  | 0.801IleCys: 0.801 ± 0.771  | 1.603IleAsp: 1.603 ± 0.785  | 0.801IleGlu: 0.801 ± 0.611  | 4.006IlePhe: 4.006 ± 1.168  | 1.603IleGly: 1.603 ± 0.979  | 0.801IleHis: 0.801 ± 1.014  | 0.801IleIle: 0.801 ± 1.014  | 4.808IleLys: 4.808 ± 1.48  | 5.609IleLeu: 5.609 ± 2.332  | 1.603IleMet: 1.603 ± 1.811  | 2.404IleAsn: 2.404 ± 1.354  | 1.603IlePro: 1.603 ± 0.785  | 1.603IleGln: 1.603 ± 1.565  | 5.609IleArg: 5.609 ± 1.82  | 8.013IleSer: 8.013 ± 1.77  | 4.006IleThr: 4.006 ± 2.24  | 5.609IleVal: 5.609 ± 3.13  | 1.603IleTrp: 1.603 ± 1.542  | 4.006IleTyr: 4.006 ± 0.963  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 3.205LysAla: 3.205 ± 1.485  | 1.603LysCys: 1.603 ± 0.979  | 2.404LysAsp: 2.404 ± 1.222  | 4.006LysGlu: 4.006 ± 2.192  | 4.006LysPhe: 4.006 ± 1.497  | 2.404LysGly: 2.404 ± 1.683  | 2.404LysHis: 2.404 ± 0.989  | 4.808LysIle: 4.808 ± 1.954  | 3.205LysLys: 3.205 ± 1.296  | 8.814LysLeu: 8.814 ± 2.806  | 0.801LysMet: 0.801 ± 0.698  | 7.212LysAsn: 7.212 ± 2.262  | 3.205LysPro: 3.205 ± 1.13  | 1.603LysGln: 1.603 ± 0.785  | 2.404LysArg: 2.404 ± 1.768  | 4.808LysSer: 4.808 ± 1.635  | 2.404LysThr: 2.404 ± 1.013  | 4.006LysVal: 4.006 ± 1.395  | 0.801LysTrp: 0.801 ± 1.014  | 3.205LysTyr: 3.205 ± 0.825  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 3.205LeuAla: 3.205 ± 2.097  | 1.603LeuCys: 1.603 ± 1.223  | 5.609LeuAsp: 5.609 ± 2.492  | 1.603LeuGlu: 1.603 ± 0.932  | 3.205LeuPhe: 3.205 ± 1.296  | 6.41LeuGly: 6.41 ± 1.383  | 4.808LeuHis: 4.808 ± 1.425  | 4.006LeuIle: 4.006 ± 1.831  | 7.212LeuLys: 7.212 ± 1.498  | 8.814LeuLeu: 8.814 ± 2.948  | 1.603LeuMet: 1.603 ± 1.355  | 5.609LeuAsn: 5.609 ± 2.233  | 3.205LeuPro: 3.205 ± 1.272  | 4.808LeuGln: 4.808 ± 1.668  | 8.814LeuArg: 8.814 ± 2.338  | 8.013LeuSer: 8.013 ± 1.781  | 5.609LeuThr: 5.609 ± 2.109  | 3.205LeuVal: 3.205 ± 1.269  | 2.404LeuTrp: 2.404 ± 1.2  | 4.006LeuTyr: 4.006 ± 1.918  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 1.603MetAla: 1.603 ± 1.156  | 0.801MetCys: 0.801 ± 0.782  | 2.404MetAsp: 2.404 ± 0.917  | 2.404MetGlu: 2.404 ± 1.719  | 2.404MetPhe: 2.404 ± 1.487  | 0.801MetGly: 0.801 ± 0.611  | 2.404MetHis: 2.404 ± 1.44  | 1.603MetIle: 1.603 ± 1.302  | 0.0MetLys: 0.0 ± 0.0  | 1.603MetLeu: 1.603 ± 1.132  | 0.0MetMet: 0.0 ± 0.0  | 0.801MetAsn: 0.801 ± 0.698  | 1.603MetPro: 1.603 ± 0.932  | 0.801MetGln: 0.801 ± 0.906  | 0.0MetArg: 0.0 ± 0.0  | 1.603MetSer: 1.603 ± 0.853  | 0.0MetThr: 0.0 ± 0.0  | 0.0MetVal: 0.0 ± 0.0  | 2.404MetTrp: 2.404 ± 0.989  | 2.404MetTyr: 2.404 ± 0.986  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 4.006AsnAla: 4.006 ± 1.212  | 2.404AsnCys: 2.404 ± 1.2  | 3.205AsnAsp: 3.205 ± 1.215  | 1.603AsnGlu: 1.603 ± 0.725  | 0.801AsnPhe: 0.801 ± 0.698  | 2.404AsnGly: 2.404 ± 0.986  | 3.205AsnHis: 3.205 ± 2.343  | 4.808AsnIle: 4.808 ± 1.236  | 0.801AsnLys: 0.801 ± 0.611  | 4.006AsnLeu: 4.006 ± 1.308  | 3.205AsnMet: 3.205 ± 1.176  | 2.404AsnAsn: 2.404 ± 1.387  | 2.404AsnPro: 2.404 ± 0.917  | 0.0AsnGln: 0.0 ± 0.0  | 2.404AsnArg: 2.404 ± 1.355  | 5.609AsnSer: 5.609 ± 1.973  | 4.006AsnThr: 4.006 ± 1.436  | 7.212AsnVal: 7.212 ± 1.816  | 0.0AsnTrp: 0.0 ± 0.0  | 4.808AsnTyr: 4.808 ± 1.166  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 2.404ProAla: 2.404 ± 1.367  | 0.801ProCys: 0.801 ± 0.771  | 3.205ProAsp: 3.205 ± 1.451  | 1.603ProGlu: 1.603 ± 0.957  | 0.801ProPhe: 0.801 ± 0.771  | 0.801ProGly: 0.801 ± 0.611  | 2.404ProHis: 2.404 ± 1.834  | 1.603ProIle: 1.603 ± 0.785  | 3.205ProLys: 3.205 ± 1.247  | 6.41ProLeu: 6.41 ± 1.153  | 0.801ProMet: 0.801 ± 0.771  | 0.801ProAsn: 0.801 ± 0.611  | 0.801ProPro: 0.801 ± 0.782  | 1.603ProGln: 1.603 ± 1.156  | 4.808ProArg: 4.808 ± 1.612  | 7.212ProSer: 7.212 ± 2.219  | 3.205ProThr: 3.205 ± 1.23  | 2.404ProVal: 2.404 ± 0.644  | 0.0ProTrp: 0.0 ± 0.0  | 3.205ProTyr: 3.205 ± 2.007  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 4.006GlnAla: 4.006 ± 1.548  | 0.0GlnCys: 0.0 ± 0.0  | 0.801GlnAsp: 0.801 ± 0.771  | 1.603GlnGlu: 1.603 ± 0.725  | 2.404GlnPhe: 2.404 ± 1.222  | 1.603GlnGly: 1.603 ± 0.957  | 2.404GlnHis: 2.404 ± 1.319  | 0.801GlnIle: 0.801 ± 0.906  | 0.801GlnLys: 0.801 ± 0.698  | 3.205GlnLeu: 3.205 ± 2.711  | 1.603GlnMet: 1.603 ± 1.355  | 0.0GlnAsn: 0.0 ± 0.0  | 0.801GlnPro: 0.801 ± 0.857  | 0.0GlnGln: 0.0 ± 0.0  | 1.603GlnArg: 1.603 ± 0.785  | 3.205GlnSer: 3.205 ± 1.622  | 0.801GlnThr: 0.801 ± 0.611  | 3.205GlnVal: 3.205 ± 1.531  | 0.0GlnTrp: 0.0 ± 0.0  | 4.006GlnTyr: 4.006 ± 1.463  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 1.603ArgAla: 1.603 ± 1.046  | 3.205ArgCys: 3.205 ± 1.809  | 2.404ArgAsp: 2.404 ± 1.367  | 3.205ArgGlu: 3.205 ± 1.571  | 3.205ArgPhe: 3.205 ± 0.922  | 3.205ArgGly: 3.205 ± 1.184  | 1.603ArgHis: 1.603 ± 0.932  | 4.808ArgIle: 4.808 ± 1.172  | 4.808ArgLys: 4.808 ± 1.419  | 5.609ArgLeu: 5.609 ± 1.56  | 0.801ArgMet: 0.801 ± 0.782  | 2.404ArgAsn: 2.404 ± 1.752  | 4.808ArgPro: 4.808 ± 1.301  | 1.603ArgGln: 1.603 ± 1.355  | 5.609ArgArg: 5.609 ± 3.757  | 4.006ArgSer: 4.006 ± 0.966  | 4.006ArgThr: 4.006 ± 1.834  | 2.404ArgVal: 2.404 ± 1.367  | 1.603ArgTrp: 1.603 ± 0.853  | 2.404ArgTyr: 2.404 ± 1.656  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 5.609SerAla: 5.609 ± 3.376  | 0.801SerCys: 0.801 ± 0.698  | 2.404SerAsp: 2.404 ± 1.222  | 0.801SerGlu: 0.801 ± 0.611  | 5.609SerPhe: 5.609 ± 1.815  | 4.006SerGly: 4.006 ± 1.877  | 3.205SerHis: 3.205 ± 1.326  | 6.41SerIle: 6.41 ± 1.712  | 8.814SerLys: 8.814 ± 2.35  | 8.013SerLeu: 8.013 ± 2.671  | 2.404SerMet: 2.404 ± 1.719  | 8.013SerAsn: 8.013 ± 1.942  | 2.404SerPro: 2.404 ± 0.989  | 0.801SerGln: 0.801 ± 0.906  | 4.006SerArg: 4.006 ± 1.426  | 8.013SerSer: 8.013 ± 2.583  | 6.41SerThr: 6.41 ± 1.556  | 2.404SerVal: 2.404 ± 1.053  | 0.801SerTrp: 0.801 ± 0.611  | 4.006SerTyr: 4.006 ± 1.702  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 4.006ThrAla: 4.006 ± 1.918  | 0.0ThrCys: 0.0 ± 0.0  | 1.603ThrAsp: 1.603 ± 0.853  | 2.404ThrGlu: 2.404 ± 1.38  | 1.603ThrPhe: 1.603 ± 0.994  | 4.808ThrGly: 4.808 ± 1.238  | 4.808ThrHis: 4.808 ± 2.143  | 4.006ThrIle: 4.006 ± 1.963  | 4.808ThrLys: 4.808 ± 2.185  | 3.205ThrLeu: 3.205 ± 1.211  | 2.404ThrMet: 2.404 ± 0.936  | 2.404ThrAsn: 2.404 ± 1.769  | 4.006ThrPro: 4.006 ± 1.382  | 2.404ThrGln: 2.404 ± 0.9  | 2.404ThrArg: 2.404 ± 0.644  | 4.808ThrSer: 4.808 ± 2.471  | 1.603ThrThr: 1.603 ± 0.994  | 3.205ThrVal: 3.205 ± 2.471  | 2.404ThrTrp: 2.404 ± 2.079  | 0.801ThrTyr: 0.801 ± 0.611  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 0.0ValAla: 0.0 ± 0.0  | 0.801ValCys: 0.801 ± 0.611  | 4.006ValAsp: 4.006 ± 2.399  | 3.205ValGlu: 3.205 ± 1.775  | 1.603ValPhe: 1.603 ± 1.089  | 0.801ValGly: 0.801 ± 0.771  | 0.0ValHis: 0.0 ± 0.0  | 5.609ValIle: 5.609 ± 1.064  | 4.006ValLys: 4.006 ± 1.181  | 5.609ValLeu: 5.609 ± 2.361  | 0.801ValMet: 0.801 ± 0.771  | 6.41ValAsn: 6.41 ± 2.079  | 3.205ValPro: 3.205 ± 1.451  | 4.808ValGln: 4.808 ± 1.544  | 4.006ValArg: 4.006 ± 2.063  | 5.609ValSer: 5.609 ± 0.938  | 4.808ValThr: 4.808 ± 3.122  | 4.006ValVal: 4.006 ± 2.193  | 0.0ValTrp: 0.0 ± 0.0  | 2.404ValTyr: 2.404 ± 1.743  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 2.404TrpAla: 2.404 ± 1.834  | 0.0TrpCys: 0.0 ± 0.0  | 0.801TrpAsp: 0.801 ± 0.782  | 0.801TrpGlu: 0.801 ± 0.906  | 0.801TrpPhe: 0.801 ± 0.857  | 0.0TrpGly: 0.0 ± 0.0  | 0.0TrpHis: 0.0 ± 0.0  | 0.0TrpIle: 0.0 ± 0.0  | 0.0TrpLys: 0.0 ± 0.0  | 0.0TrpLeu: 0.0 ± 0.0  | 0.801TrpMet: 0.801 ± 0.771  | 0.0TrpAsn: 0.0 ± 0.0  | 0.0TrpPro: 0.0 ± 0.0  | 0.801TrpGln: 0.801 ± 0.611  | 1.603TrpArg: 1.603 ± 1.218  | 1.603TrpSer: 1.603 ± 1.396  | 3.205TrpThr: 3.205 ± 1.365  | 0.801TrpVal: 0.801 ± 0.771  | 0.0TrpTrp: 0.0 ± 0.0  | 0.801TrpTyr: 0.801 ± 0.611  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 5.609TyrAla: 5.609 ± 2.419  | 0.801TyrCys: 0.801 ± 0.698  | 2.404TyrAsp: 2.404 ± 1.469  | 1.603TyrGlu: 1.603 ± 1.089  | 1.603TyrPhe: 1.603 ± 0.725  | 1.603TyrGly: 1.603 ± 1.046  | 1.603TyrHis: 1.603 ± 0.957  | 4.006TyrIle: 4.006 ± 1.53  | 2.404TyrLys: 2.404 ± 0.9  | 6.41TyrLeu: 6.41 ± 2.368  | 2.404TyrMet: 2.404 ± 1.15  | 2.404TyrAsn: 2.404 ± 0.644  | 2.404TyrPro: 2.404 ± 0.927  | 0.801TyrGln: 0.801 ± 0.771  | 3.205TyrArg: 3.205 ± 2.471  | 1.603TyrSer: 1.603 ± 1.223  | 0.801TyrThr: 0.801 ± 0.611  | 4.006TyrVal: 4.006 ± 0.891  | 0.0TyrTrp: 0.0 ± 0.0  | 0.801TyrTyr: 0.801 ± 0.771  | 0.0TyrXaa: 0.0 ± 0.0  | 
| Xaa | 0.0XaaAla: 0.0 ± 0.0  | 0.0XaaCys: 0.0 ± 0.0  | 0.0XaaAsp: 0.0 ± 0.0  | 0.0XaaGlu: 0.0 ± 0.0  | 0.0XaaPhe: 0.0 ± 0.0  | 0.0XaaGly: 0.0 ± 0.0  | 0.0XaaHis: 0.0 ± 0.0  | 0.0XaaIle: 0.0 ± 0.0  | 0.0XaaLys: 0.0 ± 0.0  | 0.0XaaLeu: 0.0 ± 0.0  | 0.0XaaMet: 0.0 ± 0.0  | 0.0XaaAsn: 0.0 ± 0.0  | 0.0XaaPro: 0.0 ± 0.0  | 0.0XaaGln: 0.0 ± 0.0  | 0.0XaaArg: 0.0 ± 0.0  | 0.0XaaSer: 0.0 ± 0.0  | 0.0XaaThr: 0.0 ± 0.0  | 0.0XaaVal: 0.0 ± 0.0  | 0.0XaaTrp: 0.0 ± 0.0  | 0.0XaaTyr: 0.0 ± 0.0  | 0.0XaaXaa: 0.0 ± 0.0  | 
| Reference: Kozlowski LP. Proteome-pI 2.0: Proteome Isoelectric Point Database Update. Nucleic Acids Res. 2021, doi: 10.1093/nar/gkab944 | Contact: Lukasz P. Kozlowski |