
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 | 9.81AlaAla: 9.81 ± 2.222  | 1.226AlaCys: 1.226 ± 0.683  | 3.066AlaAsp: 3.066 ± 0.26  | 5.825AlaGlu: 5.825 ± 1.507  | 3.066AlaPhe: 3.066 ± 0.505  | 6.438AlaGly: 6.438 ± 5.923  | 2.759AlaHis: 2.759 ± 1.03  | 2.759AlaIle: 2.759 ± 1.717  | 3.372AlaLys: 3.372 ± 1.345  | 11.036AlaLeu: 11.036 ± 0.652  | 1.839AlaMet: 1.839 ± 1.576  | 2.759AlaAsn: 2.759 ± 0.956  | 4.905AlaPro: 4.905 ± 0.497  | 3.066AlaGln: 3.066 ± 0.505  | 7.051AlaArg: 7.051 ± 0.632  | 6.438AlaSer: 6.438 ± 1.334  | 4.598AlaThr: 4.598 ± 0.622  | 6.131AlaVal: 6.131 ± 1.166  | 0.613AlaTrp: 0.613 ± 0.525  | 4.598AlaTyr: 4.598 ± 1.523  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 1.533CysAla: 1.533 ± 0.643  | 0.613CysCys: 0.613 ± 0.341  | 2.146CysAsp: 2.146 ± 0.976  | 0.92CysGlu: 0.92 ± 0.512  | 1.533CysPhe: 1.533 ± 0.643  | 1.533CysGly: 1.533 ± 0.7  | 0.307CysHis: 0.307 ± 0.171  | 0.307CysIle: 0.307 ± 0.43  | 0.92CysLys: 0.92 ± 0.512  | 3.066CysLeu: 3.066 ± 1.289  | 0.307CysMet: 0.307 ± 0.171  | 0.613CysAsn: 0.613 ± 0.341  | 0.92CysPro: 0.92 ± 0.462  | 1.226CysGln: 1.226 ± 0.681  | 0.613CysArg: 0.613 ± 0.341  | 0.92CysSer: 0.92 ± 0.324  | 1.839CysThr: 1.839 ± 0.648  | 0.307CysVal: 0.307 ± 0.171  | 0.307CysTrp: 0.307 ± 0.63  | 0.92CysTyr: 0.92 ± 0.512  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 3.679AspAla: 3.679 ± 1.712  | 1.839AspCys: 1.839 ± 1.022  | 1.839AspAsp: 1.839 ± 0.923  | 3.679AspGlu: 3.679 ± 0.278  | 1.226AspPhe: 1.226 ± 0.683  | 1.226AspGly: 1.226 ± 0.681  | 1.839AspHis: 1.839 ± 0.538  | 3.066AspIle: 3.066 ± 0.26  | 0.92AspLys: 0.92 ± 0.512  | 7.051AspLeu: 7.051 ± 1.377  | 1.533AspMet: 1.533 ± 0.508  | 0.613AspAsn: 0.613 ± 0.341  | 3.372AspPro: 3.372 ± 0.819  | 0.92AspGln: 0.92 ± 0.324  | 5.518AspArg: 5.518 ± 0.599  | 3.985AspSer: 3.985 ± 1.45  | 1.533AspThr: 1.533 ± 0.7  | 2.146AspVal: 2.146 ± 0.697  | 0.307AspTrp: 0.307 ± 0.171  | 1.226AspTyr: 1.226 ± 0.683  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 6.438GluAla: 6.438 ± 1.705  | 0.613GluCys: 0.613 ± 0.341  | 4.292GluAsp: 4.292 ± 1.957  | 3.985GluGlu: 3.985 ± 0.889  | 2.759GluPhe: 2.759 ± 0.956  | 4.292GluGly: 4.292 ± 1.327  | 0.613GluHis: 0.613 ± 0.341  | 5.212GluIle: 5.212 ± 2.67  | 3.679GluLys: 3.679 ± 0.278  | 7.357GluLeu: 7.357 ± 3.014  | 1.533GluMet: 1.533 ± 0.7  | 1.839GluAsn: 1.839 ± 0.538  | 2.759GluPro: 2.759 ± 0.679  | 2.452GluGln: 2.452 ± 1.557  | 3.679GluArg: 3.679 ± 0.988  | 4.598GluSer: 4.598 ± 1.763  | 3.372GluThr: 3.372 ± 0.37  | 5.825GluVal: 5.825 ± 3.672  | 1.226GluTrp: 1.226 ± 0.683  | 2.759GluTyr: 2.759 ± 0.6  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 3.066PheAla: 3.066 ± 0.26  | 0.613PheCys: 0.613 ± 0.341  | 1.533PheAsp: 1.533 ± 0.854  | 2.452PheGlu: 2.452 ± 0.324  | 0.92PhePhe: 0.92 ± 0.462  | 3.066PheGly: 3.066 ± 0.583  | 0.307PheHis: 0.307 ± 0.171  | 0.613PheIle: 0.613 ± 0.525  | 0.613PheLys: 0.613 ± 0.341  | 4.905PheLeu: 4.905 ± 1.124  | 0.613PheMet: 0.613 ± 0.74  | 0.0PheAsn: 0.0 ± 0.0  | 2.452PhePro: 2.452 ± 0.249  | 1.533PheGln: 1.533 ± 0.7  | 2.759PheArg: 2.759 ± 1.124  | 3.372PheSer: 3.372 ± 1.116  | 1.533PheThr: 1.533 ± 0.508  | 2.146PheVal: 2.146 ± 0.383  | 1.839PheTrp: 1.839 ± 0.612  | 0.307PheTyr: 0.307 ± 0.171  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 5.518GlyAla: 5.518 ± 1.985  | 1.226GlyCys: 1.226 ± 0.681  | 3.066GlyAsp: 3.066 ± 0.651  | 3.985GlyGlu: 3.985 ± 1.064  | 1.839GlyPhe: 1.839 ± 0.538  | 7.357GlyGly: 7.357 ± 2.165  | 1.533GlyHis: 1.533 ± 0.508  | 2.452GlyIle: 2.452 ± 1.557  | 0.92GlyLys: 0.92 ± 0.324  | 7.664GlyLeu: 7.664 ± 1.574  | 1.226GlyMet: 1.226 ± 0.408  | 0.92GlyAsn: 0.92 ± 0.572  | 3.985GlyPro: 3.985 ± 1.157  | 2.452GlyGln: 2.452 ± 1.431  | 3.985GlyArg: 3.985 ± 1.408  | 3.066GlySer: 3.066 ± 1.401  | 2.759GlyThr: 2.759 ± 1.313  | 5.518GlyVal: 5.518 ± 0.599  | 1.226GlyTrp: 1.226 ± 0.681  | 2.452GlyTyr: 2.452 ± 0.249  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.226HisAla: 1.226 ± 0.39  | 0.307HisCys: 0.307 ± 0.171  | 1.226HisAsp: 1.226 ± 0.39  | 0.613HisGlu: 0.613 ± 0.341  | 1.839HisPhe: 1.839 ± 0.612  | 1.533HisGly: 1.533 ± 0.512  | 0.613HisHis: 0.613 ± 0.341  | 0.92HisIle: 0.92 ± 0.324  | 0.613HisLys: 0.613 ± 0.525  | 2.759HisLeu: 2.759 ± 1.124  | 1.533HisMet: 1.533 ± 0.583  | 0.307HisAsn: 0.307 ± 0.171  | 1.533HisPro: 1.533 ± 0.508  | 1.839HisGln: 1.839 ± 1.024  | 0.92HisArg: 0.92 ± 0.757  | 2.146HisSer: 2.146 ± 0.697  | 0.613HisThr: 0.613 ± 0.341  | 1.533HisVal: 1.533 ± 0.974  | 0.92HisTrp: 0.92 ± 0.512  | 0.307HisTyr: 0.307 ± 0.171  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 3.066IleAla: 3.066 ± 1.014  | 1.533IleCys: 1.533 ± 0.512  | 3.066IleAsp: 3.066 ± 0.892  | 3.066IleGlu: 3.066 ± 0.58  | 2.146IlePhe: 2.146 ± 0.758  | 1.533IleGly: 1.533 ± 0.508  | 2.146IleHis: 2.146 ± 0.383  | 1.839IleIle: 1.839 ± 0.538  | 2.146IleLys: 2.146 ± 0.697  | 3.679IleLeu: 3.679 ± 0.553  | 2.452IleMet: 2.452 ± 1.24  | 0.613IleAsn: 0.613 ± 0.525  | 5.212IlePro: 5.212 ± 0.945  | 1.839IleGln: 1.839 ± 0.877  | 4.905IleArg: 4.905 ± 0.619  | 3.066IleSer: 3.066 ± 1.014  | 1.839IleThr: 1.839 ± 2.295  | 2.452IleVal: 2.452 ± 0.324  | 0.307IleTrp: 0.307 ± 0.63  | 1.533IleTyr: 1.533 ± 0.643  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 4.598LysAla: 4.598 ± 1.523  | 0.307LysCys: 0.307 ± 0.63  | 1.533LysAsp: 1.533 ± 0.253  | 3.372LysGlu: 3.372 ± 1.345  | 0.92LysPhe: 0.92 ± 0.462  | 3.985LysGly: 3.985 ± 0.382  | 1.226LysHis: 1.226 ± 0.457  | 3.985LysIle: 3.985 ± 1.6  | 0.613LysLys: 0.613 ± 0.341  | 2.759LysLeu: 2.759 ± 0.6  | 0.613LysMet: 0.613 ± 0.341  | 1.839LysAsn: 1.839 ± 0.612  | 0.613LysPro: 0.613 ± 0.341  | 1.226LysGln: 1.226 ± 0.683  | 1.226LysArg: 1.226 ± 0.681  | 2.452LysSer: 2.452 ± 0.324  | 2.452LysThr: 2.452 ± 0.802  | 2.759LysVal: 2.759 ± 0.657  | 0.613LysTrp: 0.613 ± 0.341  | 0.613LysTyr: 0.613 ± 0.525  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 9.503LeuAla: 9.503 ± 2.047  | 2.452LeuCys: 2.452 ± 0.962  | 6.438LeuAsp: 6.438 ± 0.649  | 8.277LeuGlu: 8.277 ± 1.708  | 2.146LeuPhe: 2.146 ± 0.803  | 4.598LeuGly: 4.598 ± 0.766  | 2.146LeuHis: 2.146 ± 0.383  | 4.292LeuIle: 4.292 ± 0.918  | 6.438LeuLys: 6.438 ± 2.274  | 9.81LeuLeu: 9.81 ± 1.802  | 3.985LeuMet: 3.985 ± 0.559  | 2.452LeuAsn: 2.452 ± 0.324  | 4.598LeuPro: 4.598 ± 1.74  | 4.292LeuGln: 4.292 ± 1.516  | 9.197LeuArg: 9.197 ± 1.751  | 10.73LeuSer: 10.73 ± 2.703  | 3.985LeuThr: 3.985 ± 0.275  | 7.664LeuVal: 7.664 ± 2.54  | 0.307LeuTrp: 0.307 ± 0.171  | 2.146LeuTyr: 2.146 ± 0.803  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 4.598MetAla: 4.598 ± 1.516  | 0.613MetCys: 0.613 ± 0.341  | 0.0MetAsp: 0.0 ± 0.0  | 1.839MetGlu: 1.839 ± 0.139  | 0.0MetPhe: 0.0 ± 0.0  | 3.372MetGly: 3.372 ± 1.803  | 0.0MetHis: 0.0 ± 0.0  | 1.226MetIle: 1.226 ± 0.39  | 0.613MetLys: 0.613 ± 0.341  | 2.452MetLeu: 2.452 ± 1.362  | 1.226MetMet: 1.226 ± 0.39  | 0.0MetAsn: 0.0 ± 0.0  | 0.92MetPro: 0.92 ± 0.572  | 1.226MetGln: 1.226 ± 0.39  | 2.146MetArg: 2.146 ± 1.496  | 3.066MetSer: 3.066 ± 1.552  | 1.839MetThr: 1.839 ± 0.65  | 2.759MetVal: 2.759 ± 0.485  | 0.92MetTrp: 0.92 ± 0.757  | 0.307MetTyr: 0.307 ± 0.43  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 0.307AsnAla: 0.307 ± 0.171  | 0.613AsnCys: 0.613 ± 0.341  | 0.307AsnAsp: 0.307 ± 0.171  | 1.839AsnGlu: 1.839 ± 0.139  | 1.839AsnPhe: 1.839 ± 0.612  | 1.226AsnGly: 1.226 ± 0.408  | 0.92AsnHis: 0.92 ± 0.324  | 1.839AsnIle: 1.839 ± 0.923  | 1.226AsnLys: 1.226 ± 0.683  | 2.452AsnLeu: 2.452 ± 0.962  | 1.533AsnMet: 1.533 ± 0.508  | 0.0AsnAsn: 0.0 ± 0.0  | 1.533AsnPro: 1.533 ± 1.011  | 0.613AsnGln: 0.613 ± 0.525  | 2.452AsnArg: 2.452 ± 0.662  | 2.759AsnSer: 2.759 ± 1.23  | 0.0AsnThr: 0.0 ± 0.0  | 2.759AsnVal: 2.759 ± 0.956  | 0.613AsnTrp: 0.613 ± 0.525  | 0.613AsnTyr: 0.613 ± 0.861  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 3.679ProAla: 3.679 ± 1.754  | 1.226ProCys: 1.226 ± 1.184  | 4.905ProAsp: 4.905 ± 1.605  | 3.985ProGlu: 3.985 ± 1.809  | 1.226ProPhe: 1.226 ± 0.457  | 2.452ProGly: 2.452 ± 0.249  | 1.533ProHis: 1.533 ± 0.854  | 0.92ProIle: 0.92 ± 0.324  | 1.226ProLys: 1.226 ± 0.681  | 7.971ProLeu: 7.971 ± 2.158  | 0.92ProMet: 0.92 ± 0.572  | 2.146ProAsn: 2.146 ± 0.383  | 3.985ProPro: 3.985 ± 2.219  | 2.759ProGln: 2.759 ± 0.6  | 5.212ProArg: 5.212 ± 0.807  | 4.292ProSer: 4.292 ± 1.605  | 1.533ProThr: 1.533 ± 0.253  | 1.839ProVal: 1.839 ± 0.538  | 0.613ProTrp: 0.613 ± 0.341  | 0.613ProTyr: 0.613 ± 0.341  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 3.066GlnAla: 3.066 ± 2.022  | 1.533GlnCys: 1.533 ± 0.854  | 3.372GlnAsp: 3.372 ± 0.52  | 1.533GlnGlu: 1.533 ± 0.508  | 0.92GlnPhe: 0.92 ± 0.324  | 1.533GlnGly: 1.533 ± 0.643  | 1.226GlnHis: 1.226 ± 0.39  | 1.533GlnIle: 1.533 ± 0.7  | 1.533GlnLys: 1.533 ± 0.974  | 3.066GlnLeu: 3.066 ± 1.187  | 2.452GlnMet: 2.452 ± 0.914  | 1.226GlnAsn: 1.226 ± 0.408  | 0.613GlnPro: 0.613 ± 0.341  | 0.0GlnGln: 0.0 ± 0.0  | 1.533GlnArg: 1.533 ± 0.508  | 2.759GlnSer: 2.759 ± 2.017  | 2.146GlnThr: 2.146 ± 1.496  | 2.452GlnVal: 2.452 ± 0.249  | 0.613GlnTrp: 0.613 ± 0.341  | 0.613GlnTyr: 0.613 ± 0.341  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 5.825ArgAla: 5.825 ± 1.859  | 0.613ArgCys: 0.613 ± 0.861  | 2.759ArgAsp: 2.759 ± 1.03  | 5.825ArgGlu: 5.825 ± 0.649  | 1.226ArgPhe: 1.226 ± 0.683  | 3.985ArgGly: 3.985 ± 0.275  | 1.226ArgHis: 1.226 ± 0.683  | 4.598ArgIle: 4.598 ± 1.056  | 4.598ArgLys: 4.598 ± 0.068  | 6.438ArgLeu: 6.438 ± 0.869  | 2.759ArgMet: 2.759 ± 1.973  | 2.452ArgAsn: 2.452 ± 0.662  | 3.066ArgPro: 3.066 ± 0.26  | 1.839ArgGln: 1.839 ± 0.65  | 6.131ArgArg: 6.131 ± 2.252  | 7.357ArgSer: 7.357 ± 2.885  | 3.679ArgThr: 3.679 ± 1.617  | 6.438ArgVal: 6.438 ± 0.594  | 1.226ArgTrp: 1.226 ± 0.457  | 2.452ArgTyr: 2.452 ± 0.324  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 7.357SerAla: 7.357 ± 1.525  | 1.533SerCys: 1.533 ± 0.508  | 2.146SerAsp: 2.146 ± 0.182  | 4.292SerGlu: 4.292 ± 1.394  | 2.759SerPhe: 2.759 ± 0.679  | 6.131SerGly: 6.131 ± 1.854  | 0.92SerHis: 0.92 ± 0.512  | 2.759SerIle: 2.759 ± 0.188  | 2.452SerLys: 2.452 ± 0.962  | 10.73SerLeu: 10.73 ± 1.524  | 2.146SerMet: 2.146 ± 0.941  | 1.839SerAsn: 1.839 ± 1.024  | 4.292SerPro: 4.292 ± 0.364  | 2.759SerGln: 2.759 ± 0.6  | 5.825SerArg: 5.825 ± 1.98  | 6.438SerSer: 6.438 ± 1.334  | 5.212SerThr: 5.212 ± 1.147  | 4.292SerVal: 4.292 ± 1.605  | 1.533SerTrp: 1.533 ± 0.508  | 3.679SerTyr: 3.679 ± 1.296  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 5.518ThrAla: 5.518 ± 1.127  | 1.533ThrCys: 1.533 ± 0.7  | 3.066ThrAsp: 3.066 ± 0.583  | 2.759ThrGlu: 2.759 ± 0.89  | 1.839ThrPhe: 1.839 ± 1.088  | 1.839ThrGly: 1.839 ± 1.022  | 2.452ThrHis: 2.452 ± 0.324  | 4.905ThrIle: 4.905 ± 0.714  | 1.533ThrLys: 1.533 ± 0.253  | 3.985ThrLeu: 3.985 ± 0.858  | 0.307ThrMet: 0.307 ± 0.171  | 0.92ThrAsn: 0.92 ± 0.757  | 0.92ThrPro: 0.92 ± 1.147  | 0.92ThrGln: 0.92 ± 0.324  | 2.759ThrArg: 2.759 ± 1.313  | 3.372ThrSer: 3.372 ± 1.54  | 2.759ThrThr: 2.759 ± 0.6  | 4.598ThrVal: 4.598 ± 0.758  | 0.92ThrTrp: 0.92 ± 0.512  | 0.92ThrTyr: 0.92 ± 0.324  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 6.744ValAla: 6.744 ± 3.002  | 1.533ValCys: 1.533 ± 0.854  | 1.533ValAsp: 1.533 ± 0.512  | 7.664ValGlu: 7.664 ± 1.176  | 3.679ValPhe: 3.679 ± 1.224  | 4.292ValGly: 4.292 ± 1.753  | 0.92ValHis: 0.92 ± 0.512  | 2.452ValIle: 2.452 ± 0.249  | 3.372ValLys: 3.372 ± 1.127  | 4.905ValLeu: 4.905 ± 0.876  | 1.226ValMet: 1.226 ± 0.408  | 2.759ValAsn: 2.759 ± 0.956  | 5.825ValPro: 5.825 ± 0.915  | 2.146ValGln: 2.146 ± 0.758  | 4.598ValArg: 4.598 ± 0.497  | 5.212ValSer: 5.212 ± 0.928  | 3.372ValThr: 3.372 ± 0.52  | 2.759ValVal: 2.759 ± 0.89  | 2.452ValTrp: 2.452 ± 0.781  | 1.839ValTyr: 1.839 ± 0.139  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 3.066TrpAla: 3.066 ± 1.186  | 0.92TrpCys: 0.92 ± 0.512  | 0.613TrpAsp: 0.613 ± 0.341  | 1.533TrpGlu: 1.533 ± 0.854  | 0.92TrpPhe: 0.92 ± 0.324  | 0.92TrpGly: 0.92 ± 0.512  | 0.0TrpHis: 0.0 ± 0.0  | 0.307TrpIle: 0.307 ± 0.171  | 0.307TrpLys: 0.307 ± 0.43  | 0.92TrpLeu: 0.92 ± 0.572  | 0.613TrpMet: 0.613 ± 0.341  | 0.92TrpAsn: 0.92 ± 0.462  | 0.307TrpPro: 0.307 ± 0.171  | 0.0TrpGln: 0.0 ± 0.0  | 1.226TrpArg: 1.226 ± 0.683  | 0.307TrpSer: 0.307 ± 0.171  | 2.146TrpThr: 2.146 ± 0.98  | 1.226TrpVal: 1.226 ± 0.457  | 0.307TrpTrp: 0.307 ± 0.171  | 0.307TrpTyr: 0.307 ± 0.43  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 2.759TyrAla: 2.759 ± 1.385  | 0.0TyrCys: 0.0 ± 0.0  | 0.613TyrAsp: 0.613 ± 0.525  | 1.839TyrGlu: 1.839 ± 0.139  | 1.839TyrPhe: 1.839 ± 1.024  | 1.839TyrGly: 1.839 ± 1.024  | 0.92TyrHis: 0.92 ± 0.512  | 2.452TyrIle: 2.452 ± 0.324  | 0.613TyrLys: 0.613 ± 0.525  | 2.452TyrLeu: 2.452 ± 1.362  | 0.0TyrMet: 0.0 ± 0.0  | 1.226TyrAsn: 1.226 ± 0.681  | 1.226TyrPro: 1.226 ± 0.39  | 0.613TyrGln: 0.613 ± 0.341  | 2.759TyrArg: 2.759 ± 0.89  | 2.759TyrSer: 2.759 ± 0.972  | 0.613TyrThr: 0.613 ± 0.341  | 3.679TyrVal: 3.679 ± 1.225  | 0.0TyrTrp: 0.0 ± 0.0  | 1.226TyrTyr: 1.226 ± 0.457  | 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 |