
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 | 1.39AlaAla: 1.39 ± 1.109  | 2.502AlaCys: 2.502 ± 0.587  | 1.668AlaAsp: 1.668 ± 0.607  | 2.502AlaGlu: 2.502 ± 1.376  | 1.946AlaPhe: 1.946 ± 0.567  | 1.668AlaGly: 1.668 ± 1.093  | 0.834AlaHis: 0.834 ± 0.348  | 2.224AlaIle: 2.224 ± 0.568  | 3.614AlaLys: 3.614 ± 0.809  | 2.502AlaLeu: 2.502 ± 0.611  | 0.278AlaMet: 0.278 ± 0.421  | 1.668AlaAsn: 1.668 ± 0.367  | 1.39AlaPro: 1.39 ± 0.822  | 1.946AlaGln: 1.946 ± 0.837  | 1.946AlaArg: 1.946 ± 0.546  | 2.224AlaSer: 2.224 ± 0.537  | 2.502AlaThr: 2.502 ± 1.043  | 1.668AlaVal: 1.668 ± 0.607  | 0.556AlaTrp: 0.556 ± 0.55  | 2.78AlaTyr: 2.78 ± 0.801  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.556CysAla: 0.556 ± 0.537  | 0.834CysCys: 0.834 ± 0.325  | 0.556CysAsp: 0.556 ± 0.29  | 1.39CysGlu: 1.39 ± 0.508  | 0.834CysPhe: 0.834 ± 0.587  | 1.112CysGly: 1.112 ± 0.58  | 1.39CysHis: 1.39 ± 0.576  | 1.946CysIle: 1.946 ± 0.721  | 2.224CysLys: 2.224 ± 0.651  | 2.224CysLeu: 2.224 ± 1.062  | 0.278CysMet: 0.278 ± 0.157  | 1.112CysAsn: 1.112 ± 0.402  | 1.112CysPro: 1.112 ± 0.575  | 0.834CysGln: 0.834 ± 0.397  | 0.278CysArg: 0.278 ± 0.157  | 0.834CysSer: 0.834 ± 0.325  | 0.834CysThr: 0.834 ± 0.47  | 0.834CysVal: 0.834 ± 0.627  | 0.278CysTrp: 0.278 ± 0.157  | 0.556CysTyr: 0.556 ± 0.515  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 2.224AspAla: 2.224 ± 1.581  | 1.39AspCys: 1.39 ± 0.873  | 3.614AspAsp: 3.614 ± 1.942  | 6.672AspGlu: 6.672 ± 1.126  | 2.502AspPhe: 2.502 ± 1.411  | 2.502AspGly: 2.502 ± 0.894  | 2.224AspHis: 2.224 ± 1.536  | 2.502AspIle: 2.502 ± 0.538  | 5.838AspLys: 5.838 ± 2.145  | 7.228AspLeu: 7.228 ± 0.553  | 1.39AspMet: 1.39 ± 0.287  | 2.78AspAsn: 2.78 ± 0.721  | 2.502AspPro: 2.502 ± 0.739  | 2.78AspGln: 2.78 ± 0.435  | 1.112AspArg: 1.112 ± 0.627  | 3.058AspSer: 3.058 ± 0.862  | 2.502AspThr: 2.502 ± 0.715  | 3.614AspVal: 3.614 ± 2.209  | 1.668AspTrp: 1.668 ± 0.671  | 3.614AspTyr: 3.614 ± 1.04  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 3.336GluAla: 3.336 ± 0.651  | 1.668GluCys: 1.668 ± 1.209  | 3.058GluAsp: 3.058 ± 1.329  | 5.838GluGlu: 5.838 ± 3.328  | 3.058GluPhe: 3.058 ± 1.39  | 2.502GluGly: 2.502 ± 0.791  | 1.39GluHis: 1.39 ± 0.531  | 9.174GluIle: 9.174 ± 1.973  | 6.116GluLys: 6.116 ± 1.294  | 6.672GluLeu: 6.672 ± 1.101  | 2.502GluMet: 2.502 ± 0.609  | 3.892GluAsn: 3.892 ± 0.883  | 1.39GluPro: 1.39 ± 0.587  | 2.224GluGln: 2.224 ± 0.796  | 1.946GluArg: 1.946 ± 0.774  | 5.004GluSer: 5.004 ± 1.41  | 5.004GluThr: 5.004 ± 0.832  | 3.614GluVal: 3.614 ± 0.763  | 1.668GluTrp: 1.668 ± 1.45  | 2.502GluTyr: 2.502 ± 0.715  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 0.278PheAla: 0.278 ± 0.157  | 1.39PheCys: 1.39 ± 1.005  | 2.78PheAsp: 2.78 ± 0.885  | 1.668PheGlu: 1.668 ± 0.644  | 2.224PhePhe: 2.224 ± 0.935  | 2.224PheGly: 2.224 ± 1.071  | 0.278PheHis: 0.278 ± 0.157  | 1.946PheIle: 1.946 ± 0.701  | 5.838PheLys: 5.838 ± 1.381  | 5.004PheLeu: 5.004 ± 0.796  | 0.834PheMet: 0.834 ± 0.348  | 2.78PheAsn: 2.78 ± 0.431  | 2.502PhePro: 2.502 ± 0.917  | 1.668PheGln: 1.668 ± 0.335  | 3.058PheArg: 3.058 ± 1.243  | 3.892PheSer: 3.892 ± 1.17  | 1.112PheThr: 1.112 ± 0.627  | 1.112PheVal: 1.112 ± 0.586  | 0.278PheTrp: 0.278 ± 0.157  | 0.556PheTyr: 0.556 ± 0.69  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 1.668GlyAla: 1.668 ± 0.941  | 0.0GlyCys: 0.0 ± 0.0  | 4.17GlyAsp: 4.17 ± 1.588  | 3.336GlyGlu: 3.336 ± 1.168  | 2.78GlyPhe: 2.78 ± 0.654  | 3.614GlyGly: 3.614 ± 1.076  | 0.278GlyHis: 0.278 ± 0.157  | 5.282GlyIle: 5.282 ± 1.72  | 5.282GlyLys: 5.282 ± 0.518  | 6.95GlyLeu: 6.95 ± 2.014  | 1.39GlyMet: 1.39 ± 0.608  | 3.892GlyAsn: 3.892 ± 1.11  | 0.834GlyPro: 0.834 ± 0.47  | 0.834GlyGln: 0.834 ± 0.47  | 1.668GlyArg: 1.668 ± 0.497  | 4.448GlySer: 4.448 ± 1.237  | 3.614GlyThr: 3.614 ± 2.24  | 2.502GlyVal: 2.502 ± 1.518  | 0.556GlyTrp: 0.556 ± 0.314  | 2.224GlyTyr: 2.224 ± 0.476  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.946HisAla: 1.946 ± 1.118  | 0.0HisCys: 0.0 ± 0.0  | 1.112HisAsp: 1.112 ± 0.58  | 1.39HisGlu: 1.39 ± 0.624  | 0.834HisPhe: 0.834 ± 0.47  | 0.834HisGly: 0.834 ± 0.47  | 0.278HisHis: 0.278 ± 0.353  | 2.224HisIle: 2.224 ± 0.428  | 1.946HisLys: 1.946 ± 0.567  | 1.39HisLeu: 1.39 ± 0.511  | 0.0HisMet: 0.0 ± 0.0  | 1.946HisAsn: 1.946 ± 0.647  | 1.668HisPro: 1.668 ± 0.335  | 1.112HisGln: 1.112 ± 0.402  | 0.556HisArg: 0.556 ± 0.314  | 1.668HisSer: 1.668 ± 1.253  | 1.39HisThr: 1.39 ± 0.508  | 0.834HisVal: 0.834 ± 0.587  | 0.834HisTrp: 0.834 ± 0.546  | 1.112HisTyr: 1.112 ± 0.388  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 4.448IleAla: 4.448 ± 0.952  | 1.668IleCys: 1.668 ± 0.588  | 4.726IleAsp: 4.726 ± 2.196  | 5.838IleGlu: 5.838 ± 1.001  | 2.78IlePhe: 2.78 ± 1.153  | 6.672IleGly: 6.672 ± 1.642  | 2.502IleHis: 2.502 ± 1.103  | 7.784IleIle: 7.784 ± 2.257  | 8.062IleLys: 8.062 ± 2.322  | 7.506IleLeu: 7.506 ± 0.507  | 2.224IleMet: 2.224 ± 0.937  | 5.838IleAsn: 5.838 ± 1.178  | 4.17IlePro: 4.17 ± 0.527  | 3.892IleGln: 3.892 ± 0.887  | 3.336IleArg: 3.336 ± 0.711  | 5.282IleSer: 5.282 ± 1.215  | 5.282IleThr: 5.282 ± 1.398  | 2.78IleVal: 2.78 ± 0.634  | 0.556IleTrp: 0.556 ± 0.29  | 2.78IleTyr: 2.78 ± 1.033  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 2.224LysAla: 2.224 ± 0.534  | 1.112LysCys: 1.112 ± 0.388  | 6.116LysAsp: 6.116 ± 0.714  | 6.394LysGlu: 6.394 ± 1.647  | 3.892LysPhe: 3.892 ± 1.469  | 3.892LysGly: 3.892 ± 1.086  | 1.39LysHis: 1.39 ± 0.587  | 9.73LysIle: 9.73 ± 2.181  | 7.784LysLys: 7.784 ± 1.421  | 8.34LysLeu: 8.34 ± 1.645  | 1.668LysMet: 1.668 ± 0.868  | 5.282LysAsn: 5.282 ± 1.648  | 2.502LysPro: 2.502 ± 0.899  | 3.336LysGln: 3.336 ± 0.902  | 4.17LysArg: 4.17 ± 0.786  | 3.614LysSer: 3.614 ± 1.061  | 4.17LysThr: 4.17 ± 0.924  | 4.448LysVal: 4.448 ± 1.273  | 2.224LysTrp: 2.224 ± 0.565  | 3.336LysTyr: 3.336 ± 0.785  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 2.78LeuAla: 2.78 ± 1.084  | 2.502LeuCys: 2.502 ± 0.584  | 5.56LeuAsp: 5.56 ± 0.857  | 7.506LeuGlu: 7.506 ± 1.576  | 4.726LeuPhe: 4.726 ± 0.758  | 5.838LeuGly: 5.838 ± 0.73  | 2.502LeuHis: 2.502 ± 0.703  | 9.174LeuIle: 9.174 ± 2.532  | 6.672LeuLys: 6.672 ± 1.509  | 7.228LeuLeu: 7.228 ± 2.935  | 2.224LeuMet: 2.224 ± 1.254  | 7.784LeuAsn: 7.784 ± 1.728  | 2.78LeuPro: 2.78 ± 1.286  | 2.78LeuGln: 2.78 ± 0.784  | 6.95LeuArg: 6.95 ± 1.173  | 8.34LeuSer: 8.34 ± 1.456  | 6.116LeuThr: 6.116 ± 2.141  | 2.224LeuVal: 2.224 ± 0.605  | 0.556LeuTrp: 0.556 ± 0.353  | 4.448LeuTyr: 4.448 ± 1.362  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 1.39MetAla: 1.39 ± 1.109  | 0.834MetCys: 0.834 ± 0.47  | 1.39MetAsp: 1.39 ± 0.976  | 0.556MetGlu: 0.556 ± 0.314  | 0.834MetPhe: 0.834 ± 0.47  | 1.668MetGly: 1.668 ± 0.835  | 0.278MetHis: 0.278 ± 0.157  | 2.78MetIle: 2.78 ± 0.885  | 0.278MetLys: 0.278 ± 0.157  | 2.224MetLeu: 2.224 ± 0.543  | 0.556MetMet: 0.556 ± 0.314  | 1.668MetAsn: 1.668 ± 0.763  | 0.278MetPro: 0.278 ± 0.596  | 0.556MetGln: 0.556 ± 0.353  | 1.112MetArg: 1.112 ± 0.597  | 2.224MetSer: 2.224 ± 0.331  | 0.834MetThr: 0.834 ± 0.761  | 0.556MetVal: 0.556 ± 0.315  | 0.278MetTrp: 0.278 ± 0.157  | 1.112MetTyr: 1.112 ± 0.513  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 2.224AsnAla: 2.224 ± 1.411  | 0.278AsnCys: 0.278 ± 0.596  | 3.336AsnAsp: 3.336 ± 1.429  | 4.17AsnGlu: 4.17 ± 1.312  | 2.78AsnPhe: 2.78 ± 1.133  | 2.78AsnGly: 2.78 ± 1.069  | 2.502AsnHis: 2.502 ± 0.771  | 5.282AsnIle: 5.282 ± 0.518  | 3.892AsnLys: 3.892 ± 0.867  | 8.34AsnLeu: 8.34 ± 1.534  | 1.112AsnMet: 1.112 ± 1.112  | 2.502AsnAsn: 2.502 ± 0.715  | 2.224AsnPro: 2.224 ± 1.134  | 2.502AsnGln: 2.502 ± 0.588  | 1.668AsnArg: 1.668 ± 0.944  | 5.56AsnSer: 5.56 ± 1.451  | 2.224AsnThr: 2.224 ± 0.565  | 3.614AsnVal: 3.614 ± 0.528  | 1.668AsnTrp: 1.668 ± 0.609  | 2.502AsnTyr: 2.502 ± 1.085  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 1.39ProAla: 1.39 ± 0.901  | 0.0ProCys: 0.0 ± 0.0  | 4.17ProAsp: 4.17 ± 1.096  | 1.39ProGlu: 1.39 ± 0.901  | 1.112ProPhe: 1.112 ± 0.319  | 1.668ProGly: 1.668 ± 1.069  | 1.112ProHis: 1.112 ± 0.586  | 3.892ProIle: 3.892 ± 1.052  | 2.78ProLys: 2.78 ± 0.675  | 3.336ProLeu: 3.336 ± 0.925  | 0.556ProMet: 0.556 ± 0.353  | 1.112ProAsn: 1.112 ± 0.513  | 1.668ProPro: 1.668 ± 0.68  | 1.39ProGln: 1.39 ± 1.232  | 0.834ProArg: 0.834 ± 0.325  | 3.058ProSer: 3.058 ± 0.733  | 2.78ProThr: 2.78 ± 1.022  | 1.946ProVal: 1.946 ± 0.569  | 0.834ProTrp: 0.834 ± 0.558  | 1.39ProTyr: 1.39 ± 0.287  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 1.39GlnAla: 1.39 ± 1.546  | 1.112GlnCys: 1.112 ± 0.731  | 2.224GlnAsp: 2.224 ± 1.536  | 3.614GlnGlu: 3.614 ± 0.306  | 0.834GlnPhe: 0.834 ± 0.348  | 2.224GlnGly: 2.224 ± 0.444  | 0.556GlnHis: 0.556 ± 0.842  | 3.892GlnIle: 3.892 ± 1.286  | 2.502GlnLys: 2.502 ± 0.557  | 3.614GlnLeu: 3.614 ± 1.111  | 0.834GlnMet: 0.834 ± 0.348  | 3.336GlnAsn: 3.336 ± 1.028  | 1.112GlnPro: 1.112 ± 0.408  | 0.556GlnGln: 0.556 ± 0.353  | 1.112GlnArg: 1.112 ± 0.58  | 1.39GlnSer: 1.39 ± 0.667  | 0.834GlnThr: 0.834 ± 0.348  | 1.946GlnVal: 1.946 ± 0.647  | 0.0GlnTrp: 0.0 ± 0.0  | 1.112GlnTyr: 1.112 ± 0.319  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 3.058ArgAla: 3.058 ± 1.006  | 0.834ArgCys: 0.834 ± 0.627  | 1.946ArgAsp: 1.946 ± 0.561  | 3.336ArgGlu: 3.336 ± 0.67  | 2.224ArgPhe: 2.224 ± 0.565  | 1.668ArgGly: 1.668 ± 0.651  | 1.39ArgHis: 1.39 ± 0.508  | 3.336ArgIle: 3.336 ± 0.805  | 3.058ArgLys: 3.058 ± 1.034  | 2.78ArgLeu: 2.78 ± 0.952  | 1.39ArgMet: 1.39 ± 1.341  | 2.502ArgAsn: 2.502 ± 0.705  | 2.224ArgPro: 2.224 ± 0.75  | 1.946ArgGln: 1.946 ± 0.312  | 1.668ArgArg: 1.668 ± 0.793  | 4.448ArgSer: 4.448 ± 1.253  | 2.502ArgThr: 2.502 ± 0.851  | 1.946ArgVal: 1.946 ± 0.939  | 0.278ArgTrp: 0.278 ± 0.353  | 1.39ArgTyr: 1.39 ± 0.682  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 2.502SerAla: 2.502 ± 0.919  | 1.112SerCys: 1.112 ± 0.388  | 5.56SerAsp: 5.56 ± 1.446  | 5.004SerGlu: 5.004 ± 1.155  | 3.336SerPhe: 3.336 ± 0.711  | 3.614SerGly: 3.614 ± 0.805  | 1.112SerHis: 1.112 ± 0.402  | 6.394SerIle: 6.394 ± 1.937  | 6.95SerLys: 6.95 ± 0.403  | 6.394SerLeu: 6.394 ± 1.722  | 1.39SerMet: 1.39 ± 0.484  | 2.78SerAsn: 2.78 ± 0.962  | 2.224SerPro: 2.224 ± 0.707  | 0.834SerGln: 0.834 ± 0.305  | 4.17SerArg: 4.17 ± 0.787  | 2.502SerSer: 2.502 ± 0.825  | 3.336SerThr: 3.336 ± 1.224  | 1.946SerVal: 1.946 ± 1.475  | 2.78SerTrp: 2.78 ± 0.974  | 1.668SerTyr: 1.668 ± 0.499  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 1.39ThrAla: 1.39 ± 0.683  | 0.556ThrCys: 0.556 ± 0.55  | 2.78ThrAsp: 2.78 ± 0.654  | 4.726ThrGlu: 4.726 ± 0.417  | 1.112ThrPhe: 1.112 ± 0.627  | 4.726ThrGly: 4.726 ± 1.821  | 0.834ThrHis: 0.834 ± 0.47  | 2.78ThrIle: 2.78 ± 0.931  | 3.058ThrLys: 3.058 ± 1.107  | 6.394ThrLeu: 6.394 ± 2.908  | 0.834ThrMet: 0.834 ± 0.325  | 5.004ThrAsn: 5.004 ± 1.216  | 1.39ThrPro: 1.39 ± 0.682  | 1.39ThrGln: 1.39 ± 0.481  | 3.336ThrArg: 3.336 ± 1.681  | 2.224ThrSer: 2.224 ± 0.917  | 2.502ThrThr: 2.502 ± 0.594  | 3.336ThrVal: 3.336 ± 0.67  | 2.224ThrTrp: 2.224 ± 0.476  | 1.112ThrTyr: 1.112 ± 0.388  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 1.946ValAla: 1.946 ± 1.331  | 1.112ValCys: 1.112 ± 0.388  | 3.336ValAsp: 3.336 ± 1.251  | 2.502ValGlu: 2.502 ± 1.342  | 1.668ValPhe: 1.668 ± 0.637  | 2.224ValGly: 2.224 ± 0.568  | 0.556ValHis: 0.556 ± 0.314  | 3.892ValIle: 3.892 ± 0.397  | 3.892ValLys: 3.892 ± 1.494  | 3.892ValLeu: 3.892 ± 1.049  | 0.834ValMet: 0.834 ± 0.546  | 3.058ValAsn: 3.058 ± 1.618  | 2.502ValPro: 2.502 ± 0.461  | 1.39ValGln: 1.39 ± 1.182  | 2.224ValArg: 2.224 ± 0.777  | 3.058ValSer: 3.058 ± 0.75  | 1.39ValThr: 1.39 ± 1.158  | 1.946ValVal: 1.946 ± 1.033  | 0.834ValTrp: 0.834 ± 0.964  | 1.946ValTyr: 1.946 ± 0.469  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.278TrpAla: 0.278 ± 0.157  | 0.556TrpCys: 0.556 ± 0.314  | 1.112TrpAsp: 1.112 ± 0.388  | 2.224TrpGlu: 2.224 ± 0.758  | 1.112TrpPhe: 1.112 ± 0.782  | 1.112TrpGly: 1.112 ± 0.627  | 0.0TrpHis: 0.0 ± 0.0  | 2.224TrpIle: 2.224 ± 1.113  | 0.834TrpLys: 0.834 ± 0.47  | 1.39TrpLeu: 1.39 ± 0.531  | 0.556TrpMet: 0.556 ± 0.314  | 0.834TrpAsn: 0.834 ± 0.305  | 0.556TrpPro: 0.556 ± 0.314  | 0.556TrpGln: 0.556 ± 0.72  | 1.39TrpArg: 1.39 ± 1.326  | 0.278TrpSer: 0.278 ± 0.157  | 0.834TrpThr: 0.834 ± 0.558  | 1.668TrpVal: 1.668 ± 1.611  | 0.278TrpTrp: 0.278 ± 0.157  | 1.112TrpTyr: 1.112 ± 0.388  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 1.39TyrAla: 1.39 ± 0.511  | 0.556TyrCys: 0.556 ± 0.314  | 2.502TyrAsp: 2.502 ± 0.917  | 2.502TyrGlu: 2.502 ± 1.693  | 0.834TyrPhe: 0.834 ± 0.305  | 2.78TyrGly: 2.78 ± 0.318  | 1.668TyrHis: 1.668 ± 0.335  | 1.668TyrIle: 1.668 ± 0.826  | 5.282TyrLys: 5.282 ± 0.913  | 5.282TyrLeu: 5.282 ± 1.904  | 0.278TyrMet: 0.278 ± 0.421  | 1.39TyrAsn: 1.39 ± 0.662  | 1.39TyrPro: 1.39 ± 0.784  | 1.668TyrGln: 1.668 ± 0.361  | 1.39TyrArg: 1.39 ± 0.764  | 2.502TyrSer: 2.502 ± 0.461  | 1.946TyrThr: 1.946 ± 0.523  | 1.668TyrVal: 1.668 ± 0.498  | 0.556TyrTrp: 0.556 ± 0.29  | 0.834TyrTyr: 0.834 ± 0.558  | 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 |