
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 | 3.199AlaAla: 3.199 ± 1.712  | 0.872AlaCys: 0.872 ± 0.344  | 4.653AlaAsp: 4.653 ± 0.935  | 3.199AlaGlu: 3.199 ± 1.31  | 2.035AlaPhe: 2.035 ± 0.644  | 3.78AlaGly: 3.78 ± 1.214  | 1.745AlaHis: 1.745 ± 0.899  | 4.362AlaIle: 4.362 ± 1.084  | 4.943AlaLys: 4.943 ± 1.32  | 9.596AlaLeu: 9.596 ± 3.079  | 2.035AlaMet: 2.035 ± 2.185  | 0.872AlaAsn: 0.872 ± 0.37  | 2.035AlaPro: 2.035 ± 0.634  | 2.908AlaGln: 2.908 ± 1.119  | 3.489AlaArg: 3.489 ± 1.663  | 4.362AlaSer: 4.362 ± 1.116  | 4.943AlaThr: 4.943 ± 0.92  | 2.617AlaVal: 2.617 ± 0.626  | 0.582AlaTrp: 0.582 ± 0.322  | 1.163AlaTyr: 1.163 ± 0.643  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.0CysAla: 0.0 ± 0.0  | 1.163CysCys: 1.163 ± 0.946  | 1.454CysAsp: 1.454 ± 0.56  | 0.291CysGlu: 0.291 ± 0.588  | 0.291CysPhe: 0.291 ± 0.161  | 0.582CysGly: 0.582 ± 0.679  | 0.0CysHis: 0.0 ± 0.0  | 0.291CysIle: 0.291 ± 0.336  | 1.163CysLys: 1.163 ± 0.631  | 0.872CysLeu: 0.872 ± 0.344  | 0.872CysMet: 0.872 ± 0.596  | 0.291CysAsn: 0.291 ± 0.161  | 1.163CysPro: 1.163 ± 0.599  | 1.163CysGln: 1.163 ± 0.445  | 0.291CysArg: 0.291 ± 0.336  | 2.035CysSer: 2.035 ± 0.561  | 1.163CysThr: 1.163 ± 0.599  | 1.454CysVal: 1.454 ± 0.366  | 0.0CysTrp: 0.0 ± 0.0  | 0.291CysTyr: 0.291 ± 0.161  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 2.617AspAla: 2.617 ± 0.521  | 0.582AspCys: 0.582 ± 0.3  | 3.199AspAsp: 3.199 ± 1.533  | 2.326AspGlu: 2.326 ± 0.694  | 1.745AspPhe: 1.745 ± 1.017  | 2.617AspGly: 2.617 ± 0.822  | 1.163AspHis: 1.163 ± 0.792  | 4.362AspIle: 4.362 ± 1.116  | 4.071AspLys: 4.071 ± 1.12  | 7.27AspLeu: 7.27 ± 0.921  | 0.872AspMet: 0.872 ± 0.942  | 2.617AspAsn: 2.617 ± 1.603  | 2.617AspPro: 2.617 ± 1.504  | 3.489AspGln: 3.489 ± 1.202  | 2.326AspArg: 2.326 ± 0.688  | 3.78AspSer: 3.78 ± 0.73  | 2.617AspThr: 2.617 ± 0.839  | 3.199AspVal: 3.199 ± 1.021  | 0.872AspTrp: 0.872 ± 0.616  | 1.163AspTyr: 1.163 ± 0.624  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 6.106GluAla: 6.106 ± 0.864  | 1.163GluCys: 1.163 ± 0.445  | 4.653GluAsp: 4.653 ± 2.059  | 4.362GluGlu: 4.362 ± 1.581  | 2.326GluPhe: 2.326 ± 0.695  | 4.071GluGly: 4.071 ± 1.204  | 1.163GluHis: 1.163 ± 0.643  | 3.489GluIle: 3.489 ± 0.802  | 6.106GluLys: 6.106 ± 1.016  | 6.979GluLeu: 6.979 ± 1.897  | 2.617GluMet: 2.617 ± 0.975  | 2.617GluAsn: 2.617 ± 1.271  | 2.035GluPro: 2.035 ± 0.349  | 1.163GluGln: 1.163 ± 0.446  | 4.071GluArg: 4.071 ± 1.05  | 5.525GluSer: 5.525 ± 1.751  | 4.071GluThr: 4.071 ± 0.521  | 3.199GluVal: 3.199 ± 0.666  | 1.454GluTrp: 1.454 ± 0.625  | 1.163GluTyr: 1.163 ± 0.425  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 2.035PheAla: 2.035 ± 0.546  | 0.872PheCys: 0.872 ± 0.344  | 0.872PheAsp: 0.872 ± 0.509  | 2.326PheGlu: 2.326 ± 0.786  | 1.745PhePhe: 1.745 ± 1.053  | 3.78PheGly: 3.78 ± 0.783  | 0.872PheHis: 0.872 ± 0.344  | 1.745PheIle: 1.745 ± 0.399  | 2.908PheLys: 2.908 ± 0.98  | 2.908PheLeu: 2.908 ± 1.146  | 0.0PheMet: 0.0 ± 0.0  | 0.872PheAsn: 0.872 ± 0.787  | 1.163PhePro: 1.163 ± 0.445  | 1.745PheGln: 1.745 ± 0.693  | 2.617PheArg: 2.617 ± 0.594  | 3.489PheSer: 3.489 ± 0.44  | 1.454PheThr: 1.454 ± 0.676  | 1.745PheVal: 1.745 ± 0.563  | 0.0PheTrp: 0.0 ± 0.0  | 0.582PheTyr: 0.582 ± 0.322  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 3.78GlyAla: 3.78 ± 1.172  | 0.582GlyCys: 0.582 ± 0.355  | 3.489GlyAsp: 3.489 ± 0.682  | 5.816GlyGlu: 5.816 ± 2.8  | 1.454GlyPhe: 1.454 ± 1.14  | 4.943GlyGly: 4.943 ± 1.024  | 1.745GlyHis: 1.745 ± 1.166  | 3.78GlyIle: 3.78 ± 0.815  | 3.199GlyLys: 3.199 ± 0.905  | 6.979GlyLeu: 6.979 ± 1.318  | 2.326GlyMet: 2.326 ± 0.805  | 1.163GlyAsn: 1.163 ± 0.513  | 3.199GlyPro: 3.199 ± 0.793  | 2.617GlyGln: 2.617 ± 0.558  | 3.199GlyArg: 3.199 ± 0.93  | 4.362GlySer: 4.362 ± 1.497  | 3.199GlyThr: 3.199 ± 1.395  | 3.78GlyVal: 3.78 ± 1.121  | 0.582GlyTrp: 0.582 ± 0.322  | 2.617GlyTyr: 2.617 ± 1.172  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 0.872HisAla: 0.872 ± 0.766  | 0.582HisCys: 0.582 ± 0.3  | 0.291HisAsp: 0.291 ± 0.336  | 0.872HisGlu: 0.872 ± 0.616  | 1.454HisPhe: 1.454 ± 0.551  | 0.872HisGly: 0.872 ± 0.787  | 0.582HisHis: 0.582 ± 0.3  | 2.908HisIle: 2.908 ± 1.328  | 0.872HisLys: 0.872 ± 0.344  | 4.362HisLeu: 4.362 ± 1.417  | 0.291HisMet: 0.291 ± 0.161  | 0.872HisAsn: 0.872 ± 0.482  | 2.035HisPro: 2.035 ± 0.923  | 0.872HisGln: 0.872 ± 0.459  | 2.326HisArg: 2.326 ± 0.882  | 0.582HisSer: 0.582 ± 0.3  | 1.454HisThr: 1.454 ± 0.575  | 2.035HisVal: 2.035 ± 0.824  | 0.872HisTrp: 0.872 ± 0.616  | 1.454HisTyr: 1.454 ± 1.122  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 3.78IleAla: 3.78 ± 1.054  | 0.872IleCys: 0.872 ± 0.482  | 4.071IleAsp: 4.071 ± 1.479  | 4.653IleGlu: 4.653 ± 0.578  | 2.035IlePhe: 2.035 ± 0.948  | 1.745IleGly: 1.745 ± 1.025  | 1.745IleHis: 1.745 ± 0.688  | 5.816IleIle: 5.816 ± 1.21  | 4.653IleLys: 4.653 ± 1.021  | 4.653IleLeu: 4.653 ± 1.937  | 0.872IleMet: 0.872 ± 0.849  | 1.745IleAsn: 1.745 ± 0.688  | 4.071IlePro: 4.071 ± 1.251  | 2.326IleGln: 2.326 ± 0.672  | 2.908IleArg: 2.908 ± 0.565  | 4.943IleSer: 4.943 ± 1.239  | 6.106IleThr: 6.106 ± 0.949  | 2.326IleVal: 2.326 ± 0.969  | 1.454IleTrp: 1.454 ± 0.625  | 1.454IleTyr: 1.454 ± 0.592  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 6.688LysAla: 6.688 ± 1.008  | 0.582LysCys: 0.582 ± 0.499  | 2.908LysAsp: 2.908 ± 0.58  | 4.653LysGlu: 4.653 ± 1.455  | 3.199LysPhe: 3.199 ± 0.442  | 3.78LysGly: 3.78 ± 0.616  | 0.582LysHis: 0.582 ± 0.322  | 3.489LysIle: 3.489 ± 0.799  | 5.525LysLys: 5.525 ± 2.124  | 6.979LysLeu: 6.979 ± 0.599  | 1.745LysMet: 1.745 ± 0.992  | 1.454LysAsn: 1.454 ± 0.575  | 1.745LysPro: 1.745 ± 0.992  | 0.0LysGln: 0.0 ± 0.0  | 4.653LysArg: 4.653 ± 1.557  | 3.78LysSer: 3.78 ± 0.666  | 5.525LysThr: 5.525 ± 1.363  | 4.071LysVal: 4.071 ± 1.591  | 1.163LysTrp: 1.163 ± 0.643  | 2.326LysTyr: 2.326 ± 1.49  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 6.688LeuAla: 6.688 ± 1.741  | 2.617LeuCys: 2.617 ± 1.006  | 5.816LeuAsp: 5.816 ± 2.683  | 8.433LeuGlu: 8.433 ± 2.049  | 4.943LeuPhe: 4.943 ± 1.015  | 8.433LeuGly: 8.433 ± 1.954  | 2.617LeuHis: 2.617 ± 0.907  | 5.234LeuIle: 5.234 ± 1.006  | 3.78LeuLys: 3.78 ± 1.748  | 12.794LeuLeu: 12.794 ± 3.106  | 2.326LeuMet: 2.326 ± 1.072  | 3.78LeuAsn: 3.78 ± 0.982  | 4.362LeuPro: 4.362 ± 1.73  | 4.071LeuGln: 4.071 ± 0.959  | 4.943LeuArg: 4.943 ± 0.924  | 9.887LeuSer: 9.887 ± 1.238  | 7.56LeuThr: 7.56 ± 1.678  | 7.27LeuVal: 7.27 ± 1.453  | 0.582LeuTrp: 0.582 ± 0.322  | 2.035LeuTyr: 2.035 ± 0.557  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 2.617MetAla: 2.617 ± 0.915  | 0.291MetCys: 0.291 ± 0.161  | 0.582MetAsp: 0.582 ± 0.322  | 3.199MetGlu: 3.199 ± 0.959  | 0.872MetPhe: 0.872 ± 0.509  | 2.035MetGly: 2.035 ± 0.742  | 0.0MetHis: 0.0 ± 0.0  | 2.326MetIle: 2.326 ± 0.879  | 1.745MetLys: 1.745 ± 0.603  | 0.872MetLeu: 0.872 ± 0.399  | 0.872MetMet: 0.872 ± 0.749  | 0.582MetAsn: 0.582 ± 0.322  | 0.872MetPro: 0.872 ± 0.37  | 0.291MetGln: 0.291 ± 0.336  | 2.617MetArg: 2.617 ± 0.901  | 1.454MetSer: 1.454 ± 1.05  | 2.035MetThr: 2.035 ± 0.674  | 1.454MetVal: 1.454 ± 0.804  | 0.0MetTrp: 0.0 ± 0.0  | 0.0MetTyr: 0.0 ± 0.0  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 1.745AsnAla: 1.745 ± 0.847  | 0.582AsnCys: 0.582 ± 0.689  | 1.454AsnAsp: 1.454 ± 1.237  | 1.454AsnGlu: 1.454 ± 0.583  | 0.582AsnPhe: 0.582 ± 0.355  | 1.745AsnGly: 1.745 ± 0.998  | 0.582AsnHis: 0.582 ± 0.672  | 1.745AsnIle: 1.745 ± 0.46  | 2.035AsnLys: 2.035 ± 0.865  | 4.071AsnLeu: 4.071 ± 1.123  | 0.291AsnMet: 0.291 ± 0.336  | 1.745AsnAsn: 1.745 ± 0.875  | 1.745AsnPro: 1.745 ± 0.603  | 0.872AsnGln: 0.872 ± 0.495  | 2.908AsnArg: 2.908 ± 1.444  | 1.745AsnSer: 1.745 ± 0.446  | 2.617AsnThr: 2.617 ± 1.1  | 1.163AsnVal: 1.163 ± 0.562  | 0.291AsnTrp: 0.291 ± 0.161  | 1.163AsnTyr: 1.163 ± 0.838  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 2.326ProAla: 2.326 ± 1.25  | 0.582ProCys: 0.582 ± 0.3  | 2.326ProAsp: 2.326 ± 0.891  | 3.78ProGlu: 3.78 ± 0.574  | 1.745ProPhe: 1.745 ± 0.518  | 2.035ProGly: 2.035 ± 1.21  | 2.035ProHis: 2.035 ± 0.938  | 1.745ProIle: 1.745 ± 0.657  | 4.071ProLys: 4.071 ± 1.318  | 4.653ProLeu: 4.653 ± 0.968  | 0.582ProMet: 0.582 ± 0.499  | 1.454ProAsn: 1.454 ± 0.412  | 3.78ProPro: 3.78 ± 2.528  | 0.872ProGln: 0.872 ± 0.399  | 3.489ProArg: 3.489 ± 1.302  | 4.362ProSer: 4.362 ± 2.039  | 2.326ProThr: 2.326 ± 0.796  | 1.745ProVal: 1.745 ± 0.803  | 0.582ProTrp: 0.582 ± 0.679  | 1.454ProTyr: 1.454 ± 0.592  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 3.199GlnAla: 3.199 ± 0.976  | 0.291GlnCys: 0.291 ± 0.161  | 1.745GlnAsp: 1.745 ± 0.965  | 3.489GlnGlu: 3.489 ± 0.957  | 1.163GlnPhe: 1.163 ± 0.445  | 2.326GlnGly: 2.326 ± 0.672  | 2.326GlnHis: 2.326 ± 0.842  | 1.745GlnIle: 1.745 ± 0.542  | 2.908GlnLys: 2.908 ± 1.013  | 3.78GlnLeu: 3.78 ± 0.953  | 1.163GlnMet: 1.163 ± 0.435  | 0.582GlnAsn: 0.582 ± 0.322  | 0.872GlnPro: 0.872 ± 0.509  | 0.582GlnGln: 0.582 ± 0.3  | 2.326GlnArg: 2.326 ± 0.963  | 2.617GlnSer: 2.617 ± 0.806  | 2.326GlnThr: 2.326 ± 0.805  | 3.199GlnVal: 3.199 ± 0.412  | 0.291GlnTrp: 0.291 ± 0.161  | 1.745GlnTyr: 1.745 ± 0.717  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 4.653ArgAla: 4.653 ± 2.342  | 0.291ArgCys: 0.291 ± 0.336  | 2.326ArgAsp: 2.326 ± 0.694  | 5.525ArgGlu: 5.525 ± 1.255  | 0.872ArgPhe: 0.872 ± 0.482  | 5.816ArgGly: 5.816 ± 1.138  | 0.872ArgHis: 0.872 ± 0.495  | 3.78ArgIle: 3.78 ± 1.395  | 3.199ArgLys: 3.199 ± 0.554  | 5.234ArgLeu: 5.234 ± 1.635  | 1.745ArgMet: 1.745 ± 0.692  | 1.454ArgAsn: 1.454 ± 0.851  | 1.745ArgPro: 1.745 ± 1.066  | 3.489ArgGln: 3.489 ± 0.778  | 2.617ArgArg: 2.617 ± 0.784  | 3.78ArgSer: 3.78 ± 1.657  | 3.199ArgThr: 3.199 ± 0.627  | 4.362ArgVal: 4.362 ± 0.995  | 0.291ArgTrp: 0.291 ± 0.161  | 1.163ArgTyr: 1.163 ± 0.446  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 5.234SerAla: 5.234 ± 0.8  | 0.291SerCys: 0.291 ± 0.336  | 4.943SerAsp: 4.943 ± 0.947  | 4.071SerGlu: 4.071 ± 0.797  | 2.617SerPhe: 2.617 ± 1.425  | 4.362SerGly: 4.362 ± 1.041  | 1.745SerHis: 1.745 ± 1.075  | 4.362SerIle: 4.362 ± 0.854  | 4.071SerLys: 4.071 ± 0.641  | 8.433SerLeu: 8.433 ± 2.183  | 1.163SerMet: 1.163 ± 0.505  | 2.326SerAsn: 2.326 ± 0.882  | 4.071SerPro: 4.071 ± 1.693  | 3.489SerGln: 3.489 ± 0.903  | 3.199SerArg: 3.199 ± 0.741  | 5.234SerSer: 5.234 ± 1.103  | 6.688SerThr: 6.688 ± 1.554  | 6.397SerVal: 6.397 ± 0.833  | 1.454SerTrp: 1.454 ± 0.575  | 2.326SerTyr: 2.326 ± 1.396  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 3.199ThrAla: 3.199 ± 0.763  | 1.454ThrCys: 1.454 ± 0.366  | 3.199ThrAsp: 3.199 ± 1.118  | 3.489ThrGlu: 3.489 ± 0.793  | 2.035ThrPhe: 2.035 ± 0.779  | 3.78ThrGly: 3.78 ± 1.289  | 3.489ThrHis: 3.489 ± 1.48  | 5.525ThrIle: 5.525 ± 1.468  | 5.234ThrLys: 5.234 ± 1.447  | 6.688ThrLeu: 6.688 ± 1.573  | 2.326ThrMet: 2.326 ± 0.695  | 1.163ThrAsn: 1.163 ± 0.946  | 2.617ThrPro: 2.617 ± 1.539  | 4.943ThrGln: 4.943 ± 1.488  | 4.071ThrArg: 4.071 ± 1.173  | 7.27ThrSer: 7.27 ± 1.838  | 3.489ThrThr: 3.489 ± 2.2  | 2.326ThrVal: 2.326 ± 1.682  | 1.454ThrTrp: 1.454 ± 0.575  | 1.745ThrTyr: 1.745 ± 0.82  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 2.326ValAla: 2.326 ± 0.614  | 0.872ValCys: 0.872 ± 0.579  | 3.489ValAsp: 3.489 ± 1.407  | 4.362ValGlu: 4.362 ± 0.746  | 1.454ValPhe: 1.454 ± 0.575  | 3.199ValGly: 3.199 ± 0.725  | 2.326ValHis: 2.326 ± 0.694  | 3.489ValIle: 3.489 ± 0.752  | 2.035ValLys: 2.035 ± 0.409  | 6.106ValLeu: 6.106 ± 1.607  | 0.872ValMet: 0.872 ± 0.355  | 3.199ValAsn: 3.199 ± 0.566  | 4.071ValPro: 4.071 ± 0.666  | 1.745ValGln: 1.745 ± 0.542  | 3.199ValArg: 3.199 ± 1.35  | 4.653ValSer: 4.653 ± 1.144  | 6.106ValThr: 6.106 ± 1.27  | 3.489ValVal: 3.489 ± 1.336  | 0.582ValTrp: 0.582 ± 0.322  | 1.454ValTyr: 1.454 ± 0.575  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.872TrpAla: 0.872 ± 0.482  | 0.291TrpCys: 0.291 ± 0.161  | 0.582TrpAsp: 0.582 ± 0.3  | 1.454TrpGlu: 1.454 ± 0.804  | 0.291TrpPhe: 0.291 ± 0.161  | 1.163TrpGly: 1.163 ± 0.445  | 0.0TrpHis: 0.0 ± 0.0  | 0.582TrpIle: 0.582 ± 0.3  | 1.163TrpLys: 1.163 ± 0.599  | 0.582TrpLeu: 0.582 ± 0.322  | 0.582TrpMet: 0.582 ± 0.637  | 0.872TrpAsn: 0.872 ± 0.344  | 0.582TrpPro: 0.582 ± 0.3  | 0.291TrpGln: 0.291 ± 0.336  | 0.582TrpArg: 0.582 ± 0.322  | 0.872TrpSer: 0.872 ± 0.616  | 0.872TrpThr: 0.872 ± 0.482  | 1.163TrpVal: 1.163 ± 0.445  | 0.0TrpTrp: 0.0 ± 0.0  | 0.291TrpTyr: 0.291 ± 0.161  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 1.454TyrAla: 1.454 ± 1.099  | 0.0TyrCys: 0.0 ± 0.0  | 1.454TyrAsp: 1.454 ± 0.613  | 0.872TyrGlu: 0.872 ± 0.399  | 0.872TyrPhe: 0.872 ± 0.482  | 1.745TyrGly: 1.745 ± 1.034  | 0.872TyrHis: 0.872 ± 0.344  | 1.454TyrIle: 1.454 ± 0.707  | 1.163TyrLys: 1.163 ± 0.646  | 4.362TyrLeu: 4.362 ± 1.17  | 0.872TyrMet: 0.872 ± 0.509  | 0.872TyrAsn: 0.872 ± 0.579  | 1.163TyrPro: 1.163 ± 0.347  | 1.745TyrGln: 1.745 ± 0.717  | 0.582TyrArg: 0.582 ± 0.3  | 1.745TyrSer: 1.745 ± 0.439  | 1.745TyrThr: 1.745 ± 0.518  | 2.035TyrVal: 2.035 ± 0.804  | 0.582TyrTrp: 0.582 ± 0.3  | 1.745TyrTyr: 1.745 ± 1.034  | 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 |