
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 | 5.01AlaAla: 5.01 ± 0.786  | 0.978AlaCys: 0.978 ± 0.457  | 2.933AlaAsp: 2.933 ± 0.746  | 3.788AlaGlu: 3.788 ± 0.582  | 3.177AlaPhe: 3.177 ± 0.611  | 3.055AlaGly: 3.055 ± 0.889  | 0.855AlaHis: 0.855 ± 0.471  | 3.299AlaIle: 3.299 ± 0.532  | 2.81AlaLys: 2.81 ± 0.632  | 6.109AlaLeu: 6.109 ± 0.755  | 1.1AlaMet: 1.1 ± 0.305  | 4.521AlaAsn: 4.521 ± 0.569  | 3.788AlaPro: 3.788 ± 0.739  | 3.055AlaGln: 3.055 ± 0.521  | 2.566AlaArg: 2.566 ± 0.612  | 3.421AlaSer: 3.421 ± 0.66  | 2.81AlaThr: 2.81 ± 0.457  | 4.032AlaVal: 4.032 ± 0.789  | 0.855AlaTrp: 0.855 ± 0.351  | 2.81AlaTyr: 2.81 ± 0.563  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.611CysAla: 0.611 ± 0.296  | 0.733CysCys: 0.733 ± 0.291  | 1.222CysAsp: 1.222 ± 0.509  | 0.855CysGlu: 0.855 ± 0.473  | 0.978CysPhe: 0.978 ± 0.327  | 1.1CysGly: 1.1 ± 0.428  | 0.244CysHis: 0.244 ± 0.175  | 0.489CysIle: 0.489 ± 0.277  | 1.1CysLys: 1.1 ± 0.482  | 0.978CysLeu: 0.978 ± 0.4  | 1.1CysMet: 1.1 ± 0.334  | 1.588CysAsn: 1.588 ± 0.475  | 1.1CysPro: 1.1 ± 0.369  | 0.367CysGln: 0.367 ± 0.225  | 0.733CysArg: 0.733 ± 0.424  | 0.978CysSer: 0.978 ± 0.314  | 0.733CysThr: 0.733 ± 0.428  | 1.1CysVal: 1.1 ± 0.41  | 0.367CysTrp: 0.367 ± 0.247  | 0.611CysTyr: 0.611 ± 0.294  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 1.588AspAla: 1.588 ± 0.373  | 0.733AspCys: 0.733 ± 0.238  | 2.077AspAsp: 2.077 ± 0.761  | 4.399AspGlu: 4.399 ± 0.767  | 3.055AspPhe: 3.055 ± 0.628  | 2.81AspGly: 2.81 ± 1.078  | 0.367AspHis: 0.367 ± 0.177  | 3.788AspIle: 3.788 ± 0.525  | 2.566AspLys: 2.566 ± 0.408  | 3.788AspLeu: 3.788 ± 0.753  | 0.855AspMet: 0.855 ± 0.288  | 3.91AspAsn: 3.91 ± 0.511  | 1.955AspPro: 1.955 ± 0.578  | 1.955AspGln: 1.955 ± 0.382  | 1.955AspArg: 1.955 ± 0.614  | 1.955AspSer: 1.955 ± 0.426  | 2.322AspThr: 2.322 ± 0.486  | 3.177AspVal: 3.177 ± 0.45  | 0.489AspTrp: 0.489 ± 0.243  | 1.466AspTyr: 1.466 ± 0.364  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 3.299GluAla: 3.299 ± 0.66  | 0.978GluCys: 0.978 ± 0.35  | 3.421GluAsp: 3.421 ± 0.639  | 7.576GluGlu: 7.576 ± 1.422  | 1.955GluPhe: 1.955 ± 0.407  | 3.177GluGly: 3.177 ± 0.794  | 0.733GluHis: 0.733 ± 0.301  | 4.765GluIle: 4.765 ± 0.762  | 3.177GluLys: 3.177 ± 0.748  | 4.277GluLeu: 4.277 ± 0.792  | 1.344GluMet: 1.344 ± 0.425  | 2.933GluAsn: 2.933 ± 0.434  | 2.444GluPro: 2.444 ± 0.511  | 1.955GluGln: 1.955 ± 0.521  | 3.299GluArg: 3.299 ± 0.86  | 4.643GluSer: 4.643 ± 0.925  | 4.277GluThr: 4.277 ± 0.804  | 4.032GluVal: 4.032 ± 0.69  | 0.733GluTrp: 0.733 ± 0.243  | 2.566GluTyr: 2.566 ± 0.5  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 2.322PheAla: 2.322 ± 0.47  | 0.611PheCys: 0.611 ± 0.321  | 2.566PheAsp: 2.566 ± 0.615  | 2.81PheGlu: 2.81 ± 0.768  | 2.566PhePhe: 2.566 ± 0.551  | 1.711PheGly: 1.711 ± 0.452  | 0.733PheHis: 0.733 ± 0.215  | 2.933PheIle: 2.933 ± 0.557  | 3.421PheLys: 3.421 ± 0.758  | 5.376PheLeu: 5.376 ± 0.909  | 1.344PheMet: 1.344 ± 0.257  | 3.055PheAsn: 3.055 ± 0.343  | 2.322PhePro: 2.322 ± 0.509  | 1.466PheGln: 1.466 ± 0.306  | 3.177PheArg: 3.177 ± 0.794  | 3.299PheSer: 3.299 ± 0.73  | 2.444PheThr: 2.444 ± 0.477  | 3.177PheVal: 3.177 ± 0.439  | 0.0PheTrp: 0.0 ± 0.0  | 1.711PheTyr: 1.711 ± 0.315  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 3.666GlyAla: 3.666 ± 0.713  | 0.733GlyCys: 0.733 ± 0.26  | 2.199GlyAsp: 2.199 ± 0.463  | 2.933GlyGlu: 2.933 ± 0.616  | 2.444GlyPhe: 2.444 ± 0.448  | 3.788GlyGly: 3.788 ± 0.983  | 1.344GlyHis: 1.344 ± 0.348  | 3.299GlyIle: 3.299 ± 0.681  | 3.177GlyLys: 3.177 ± 0.757  | 5.01GlyLeu: 5.01 ± 1.667  | 0.978GlyMet: 0.978 ± 0.384  | 2.688GlyAsn: 2.688 ± 0.874  | 2.444GlyPro: 2.444 ± 0.4  | 1.955GlyGln: 1.955 ± 0.62  | 3.421GlyArg: 3.421 ± 0.661  | 5.01GlySer: 5.01 ± 0.793  | 3.666GlyThr: 3.666 ± 0.766  | 3.788GlyVal: 3.788 ± 0.562  | 0.611GlyTrp: 0.611 ± 0.21  | 1.222GlyTyr: 1.222 ± 0.325  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.344HisAla: 1.344 ± 0.389  | 0.733HisCys: 0.733 ± 0.451  | 0.855HisAsp: 0.855 ± 0.348  | 0.244HisGlu: 0.244 ± 0.15  | 0.733HisPhe: 0.733 ± 0.269  | 1.222HisGly: 1.222 ± 0.316  | 0.489HisHis: 0.489 ± 0.171  | 1.222HisIle: 1.222 ± 0.322  | 0.611HisLys: 0.611 ± 0.277  | 2.199HisLeu: 2.199 ± 0.499  | 0.122HisMet: 0.122 ± 0.111  | 1.344HisAsn: 1.344 ± 0.411  | 1.833HisPro: 1.833 ± 0.413  | 0.611HisGln: 0.611 ± 0.174  | 0.978HisArg: 0.978 ± 0.267  | 1.1HisSer: 1.1 ± 0.442  | 1.344HisThr: 1.344 ± 0.34  | 1.222HisVal: 1.222 ± 0.475  | 0.244HisTrp: 0.244 ± 0.179  | 0.489HisTyr: 0.489 ± 0.231  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 4.277IleAla: 4.277 ± 0.764  | 0.733IleCys: 0.733 ± 0.325  | 2.444IleAsp: 2.444 ± 0.545  | 3.177IleGlu: 3.177 ± 0.726  | 2.81IlePhe: 2.81 ± 0.514  | 3.055IleGly: 3.055 ± 0.88  | 1.466IleHis: 1.466 ± 0.38  | 2.81IleIle: 2.81 ± 0.652  | 3.299IleLys: 3.299 ± 0.644  | 5.499IleLeu: 5.499 ± 0.822  | 1.222IleMet: 1.222 ± 0.284  | 2.933IleAsn: 2.933 ± 0.505  | 3.543IlePro: 3.543 ± 0.872  | 2.322IleGln: 2.322 ± 0.48  | 2.444IleArg: 2.444 ± 0.557  | 4.643IleSer: 4.643 ± 0.749  | 4.521IleThr: 4.521 ± 0.768  | 3.421IleVal: 3.421 ± 0.667  | 0.489IleTrp: 0.489 ± 0.265  | 2.566IleTyr: 2.566 ± 0.618  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 4.643LysAla: 4.643 ± 1.002  | 1.222LysCys: 1.222 ± 0.561  | 2.933LysAsp: 2.933 ± 0.738  | 4.154LysGlu: 4.154 ± 0.785  | 2.933LysPhe: 2.933 ± 0.858  | 2.566LysGly: 2.566 ± 0.761  | 0.855LysHis: 0.855 ± 0.355  | 4.032LysIle: 4.032 ± 0.78  | 4.765LysLys: 4.765 ± 0.887  | 5.254LysLeu: 5.254 ± 1.401  | 0.978LysMet: 0.978 ± 0.391  | 3.543LysAsn: 3.543 ± 0.916  | 1.955LysPro: 1.955 ± 0.41  | 3.177LysGln: 3.177 ± 0.558  | 4.399LysArg: 4.399 ± 1.629  | 4.277LysSer: 4.277 ± 0.816  | 3.177LysThr: 3.177 ± 0.66  | 3.299LysVal: 3.299 ± 0.636  | 0.611LysTrp: 0.611 ± 0.234  | 2.566LysTyr: 2.566 ± 0.64  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 5.621LeuAla: 5.621 ± 0.825  | 1.466LeuCys: 1.466 ± 0.464  | 3.91LeuAsp: 3.91 ± 0.581  | 4.643LeuGlu: 4.643 ± 0.924  | 2.81LeuPhe: 2.81 ± 0.562  | 6.232LeuGly: 6.232 ± 1.03  | 2.566LeuHis: 2.566 ± 0.582  | 4.521LeuIle: 4.521 ± 0.663  | 9.286LeuLys: 9.286 ± 1.696  | 9.042LeuLeu: 9.042 ± 1.436  | 2.688LeuMet: 2.688 ± 0.645  | 4.888LeuAsn: 4.888 ± 0.862  | 5.499LeuPro: 5.499 ± 0.922  | 5.743LeuGln: 5.743 ± 1.137  | 4.154LeuArg: 4.154 ± 0.76  | 6.598LeuSer: 6.598 ± 1.187  | 5.132LeuThr: 5.132 ± 0.756  | 4.154LeuVal: 4.154 ± 0.681  | 1.833LeuTrp: 1.833 ± 0.419  | 3.421LeuTyr: 3.421 ± 0.837  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 1.711MetAla: 1.711 ± 0.366  | 0.611MetCys: 0.611 ± 0.289  | 1.222MetAsp: 1.222 ± 0.32  | 0.978MetGlu: 0.978 ± 0.235  | 1.222MetPhe: 1.222 ± 0.297  | 1.344MetGly: 1.344 ± 0.287  | 0.978MetHis: 0.978 ± 0.39  | 0.855MetIle: 0.855 ± 0.326  | 0.978MetLys: 0.978 ± 0.432  | 1.955MetLeu: 1.955 ± 0.49  | 0.367MetMet: 0.367 ± 0.259  | 1.588MetAsn: 1.588 ± 0.331  | 2.199MetPro: 2.199 ± 0.45  | 0.855MetGln: 0.855 ± 0.266  | 1.222MetArg: 1.222 ± 0.433  | 1.588MetSer: 1.588 ± 0.34  | 1.1MetThr: 1.1 ± 0.328  | 1.222MetVal: 1.222 ± 0.311  | 0.0MetTrp: 0.0 ± 0.0  | 1.466MetTyr: 1.466 ± 0.306  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 3.299AsnAla: 3.299 ± 0.586  | 0.733AsnCys: 0.733 ± 0.313  | 2.444AsnAsp: 2.444 ± 0.49  | 4.399AsnGlu: 4.399 ± 0.651  | 4.032AsnPhe: 4.032 ± 0.449  | 3.177AsnGly: 3.177 ± 0.742  | 1.1AsnHis: 1.1 ± 0.361  | 5.01AsnIle: 5.01 ± 0.73  | 2.688AsnLys: 2.688 ± 0.752  | 6.476AsnLeu: 6.476 ± 0.684  | 1.222AsnMet: 1.222 ± 0.428  | 3.91AsnAsn: 3.91 ± 0.882  | 4.032AsnPro: 4.032 ± 0.647  | 2.322AsnGln: 2.322 ± 0.574  | 2.688AsnArg: 2.688 ± 0.567  | 4.765AsnSer: 4.765 ± 0.587  | 2.688AsnThr: 2.688 ± 0.685  | 2.688AsnVal: 2.688 ± 0.473  | 0.978AsnTrp: 0.978 ± 0.394  | 3.177AsnTyr: 3.177 ± 0.774  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 3.543ProAla: 3.543 ± 0.613  | 0.855ProCys: 0.855 ± 0.33  | 2.566ProAsp: 2.566 ± 0.554  | 2.933ProGlu: 2.933 ± 0.518  | 3.055ProPhe: 3.055 ± 0.414  | 2.566ProGly: 2.566 ± 0.468  | 1.1ProHis: 1.1 ± 0.342  | 2.688ProIle: 2.688 ± 0.45  | 2.933ProLys: 2.933 ± 0.681  | 5.499ProLeu: 5.499 ± 0.839  | 2.322ProMet: 2.322 ± 0.365  | 3.177ProAsn: 3.177 ± 0.652  | 5.987ProPro: 5.987 ± 1.013  | 2.199ProGln: 2.199 ± 0.682  | 3.177ProArg: 3.177 ± 0.679  | 3.788ProSer: 3.788 ± 0.843  | 3.421ProThr: 3.421 ± 0.519  | 3.788ProVal: 3.788 ± 0.851  | 0.367ProTrp: 0.367 ± 0.25  | 2.199ProTyr: 2.199 ± 0.539  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 3.788GlnAla: 3.788 ± 0.658  | 0.611GlnCys: 0.611 ± 0.175  | 1.222GlnAsp: 1.222 ± 0.332  | 2.688GlnGlu: 2.688 ± 0.532  | 1.222GlnPhe: 1.222 ± 0.327  | 2.688GlnGly: 2.688 ± 0.401  | 0.978GlnHis: 0.978 ± 0.355  | 2.322GlnIle: 2.322 ± 0.566  | 2.444GlnLys: 2.444 ± 0.588  | 4.765GlnLeu: 4.765 ± 1.037  | 0.733GlnMet: 0.733 ± 0.278  | 2.566GlnAsn: 2.566 ± 0.566  | 1.833GlnPro: 1.833 ± 0.465  | 1.955GlnGln: 1.955 ± 0.471  | 1.711GlnArg: 1.711 ± 0.578  | 3.91GlnSer: 3.91 ± 0.942  | 3.666GlnThr: 3.666 ± 0.723  | 2.444GlnVal: 2.444 ± 0.521  | 0.489GlnTrp: 0.489 ± 0.203  | 0.978GlnTyr: 0.978 ± 0.365  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 3.788ArgAla: 3.788 ± 0.883  | 1.1ArgCys: 1.1 ± 0.359  | 1.344ArgAsp: 1.344 ± 0.304  | 2.81ArgGlu: 2.81 ± 0.612  | 2.322ArgPhe: 2.322 ± 0.673  | 2.322ArgGly: 2.322 ± 0.613  | 0.611ArgHis: 0.611 ± 0.301  | 3.299ArgIle: 3.299 ± 0.581  | 3.788ArgLys: 3.788 ± 0.775  | 4.643ArgLeu: 4.643 ± 0.594  | 1.1ArgMet: 1.1 ± 0.376  | 4.154ArgAsn: 4.154 ± 0.77  | 2.199ArgPro: 2.199 ± 0.552  | 1.955ArgGln: 1.955 ± 0.485  | 4.888ArgArg: 4.888 ± 1.568  | 3.055ArgSer: 3.055 ± 0.748  | 2.81ArgThr: 2.81 ± 0.691  | 2.933ArgVal: 2.933 ± 0.909  | 0.855ArgTrp: 0.855 ± 0.26  | 1.833ArgTyr: 1.833 ± 0.557  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 3.91SerAla: 3.91 ± 0.606  | 1.222SerCys: 1.222 ± 0.617  | 3.177SerAsp: 3.177 ± 0.697  | 3.788SerGlu: 3.788 ± 0.664  | 4.765SerPhe: 4.765 ± 0.779  | 4.888SerGly: 4.888 ± 0.8  | 1.1SerHis: 1.1 ± 0.438  | 3.666SerIle: 3.666 ± 0.727  | 3.91SerLys: 3.91 ± 0.737  | 6.965SerLeu: 6.965 ± 0.996  | 1.222SerMet: 1.222 ± 0.333  | 4.765SerAsn: 4.765 ± 0.993  | 3.788SerPro: 3.788 ± 0.579  | 2.444SerGln: 2.444 ± 0.433  | 3.177SerArg: 3.177 ± 0.672  | 5.743SerSer: 5.743 ± 0.924  | 4.154SerThr: 4.154 ± 0.843  | 5.376SerVal: 5.376 ± 0.726  | 0.733SerTrp: 0.733 ± 0.318  | 3.299SerTyr: 3.299 ± 0.993  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 3.421ThrAla: 3.421 ± 0.685  | 1.222ThrCys: 1.222 ± 0.405  | 2.688ThrAsp: 2.688 ± 0.449  | 3.421ThrGlu: 3.421 ± 0.428  | 2.688ThrPhe: 2.688 ± 0.431  | 2.81ThrGly: 2.81 ± 0.774  | 0.978ThrHis: 0.978 ± 0.333  | 3.299ThrIle: 3.299 ± 0.578  | 3.055ThrLys: 3.055 ± 0.794  | 7.331ThrLeu: 7.331 ± 0.79  | 1.344ThrMet: 1.344 ± 0.465  | 3.421ThrAsn: 3.421 ± 0.563  | 3.788ThrPro: 3.788 ± 0.751  | 2.199ThrGln: 2.199 ± 0.403  | 3.177ThrArg: 3.177 ± 0.535  | 4.643ThrSer: 4.643 ± 0.794  | 3.055ThrThr: 3.055 ± 0.576  | 3.788ThrVal: 3.788 ± 0.618  | 0.733ThrTrp: 0.733 ± 0.345  | 2.933ThrTyr: 2.933 ± 0.728  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 2.566ValAla: 2.566 ± 0.492  | 0.855ValCys: 0.855 ± 0.22  | 2.933ValAsp: 2.933 ± 0.973  | 3.055ValGlu: 3.055 ± 0.623  | 2.566ValPhe: 2.566 ± 0.318  | 3.055ValGly: 3.055 ± 0.662  | 0.611ValHis: 0.611 ± 0.34  | 3.299ValIle: 3.299 ± 0.502  | 3.91ValLys: 3.91 ± 0.966  | 5.254ValLeu: 5.254 ± 0.556  | 1.1ValMet: 1.1 ± 0.32  | 3.788ValAsn: 3.788 ± 0.98  | 4.765ValPro: 4.765 ± 0.868  | 3.055ValGln: 3.055 ± 0.644  | 2.933ValArg: 2.933 ± 0.924  | 4.643ValSer: 4.643 ± 0.803  | 5.01ValThr: 5.01 ± 0.61  | 3.299ValVal: 3.299 ± 0.397  | 0.244ValTrp: 0.244 ± 0.137  | 3.055ValTyr: 3.055 ± 0.442  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.855TrpAla: 0.855 ± 0.292  | 0.0TrpCys: 0.0 ± 0.0  | 0.611TrpAsp: 0.611 ± 0.319  | 0.611TrpGlu: 0.611 ± 0.27  | 0.122TrpPhe: 0.122 ± 0.115  | 0.978TrpGly: 0.978 ± 0.35  | 0.122TrpHis: 0.122 ± 0.115  | 0.244TrpIle: 0.244 ± 0.156  | 1.1TrpLys: 1.1 ± 0.558  | 0.611TrpLeu: 0.611 ± 0.217  | 0.733TrpMet: 0.733 ± 0.279  | 0.367TrpAsn: 0.367 ± 0.202  | 0.611TrpPro: 0.611 ± 0.258  | 1.222TrpGln: 1.222 ± 0.494  | 0.244TrpArg: 0.244 ± 0.147  | 0.733TrpSer: 0.733 ± 0.372  | 1.1TrpThr: 1.1 ± 0.404  | 0.367TrpVal: 0.367 ± 0.203  | 0.122TrpTrp: 0.122 ± 0.115  | 0.244TrpTyr: 0.244 ± 0.171  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 1.711TyrAla: 1.711 ± 0.616  | 0.855TyrCys: 0.855 ± 0.29  | 2.444TyrAsp: 2.444 ± 0.754  | 2.322TyrGlu: 2.322 ± 0.556  | 1.588TyrPhe: 1.588 ± 0.458  | 1.833TyrGly: 1.833 ± 0.453  | 1.711TyrHis: 1.711 ± 0.543  | 1.833TyrIle: 1.833 ± 0.479  | 2.322TyrLys: 2.322 ± 0.848  | 3.177TyrLeu: 3.177 ± 0.97  | 1.466TyrMet: 1.466 ± 0.331  | 2.688TyrAsn: 2.688 ± 0.656  | 2.077TyrPro: 2.077 ± 0.367  | 2.199TyrGln: 2.199 ± 0.524  | 1.466TyrArg: 1.466 ± 0.401  | 3.421TyrSer: 3.421 ± 0.808  | 2.566TyrThr: 2.566 ± 0.432  | 2.688TyrVal: 2.688 ± 0.561  | 0.244TyrTrp: 0.244 ± 0.156  | 1.711TyrTyr: 1.711 ± 0.461  | 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 |