
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 | 4.721AlaAla: 4.721 ± 2.415  | 0.262AlaCys: 0.262 ± 0.148  | 4.458AlaAsp: 4.458 ± 0.699  | 4.196AlaGlu: 4.196 ± 0.844  | 1.311AlaPhe: 1.311 ± 0.583  | 2.885AlaGly: 2.885 ± 1.052  | 0.787AlaHis: 0.787 ± 0.673  | 4.458AlaIle: 4.458 ± 1.569  | 3.147AlaLys: 3.147 ± 1.701  | 4.196AlaLeu: 4.196 ± 1.193  | 1.049AlaMet: 1.049 ± 0.323  | 2.098AlaAsn: 2.098 ± 1.28  | 1.836AlaPro: 1.836 ± 1.041  | 1.836AlaGln: 1.836 ± 1.309  | 2.623AlaArg: 2.623 ± 1.315  | 6.557AlaSer: 6.557 ± 1.893  | 3.672AlaThr: 3.672 ± 1.647  | 5.245AlaVal: 5.245 ± 1.66  | 0.262AlaTrp: 0.262 ± 0.148  | 2.623AlaTyr: 2.623 ± 0.52  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 1.049CysAla: 1.049 ± 0.651  | 0.787CysCys: 0.787 ± 0.445  | 1.311CysAsp: 1.311 ± 0.57  | 0.787CysGlu: 0.787 ± 0.312  | 0.787CysPhe: 0.787 ± 0.312  | 1.836CysGly: 1.836 ± 0.74  | 0.262CysHis: 0.262 ± 0.148  | 0.787CysIle: 0.787 ± 0.445  | 0.525CysLys: 0.525 ± 0.297  | 1.574CysLeu: 1.574 ± 0.679  | 0.525CysMet: 0.525 ± 0.297  | 1.049CysAsn: 1.049 ± 0.414  | 1.836CysPro: 1.836 ± 0.83  | 0.262CysGln: 0.262 ± 0.524  | 1.311CysArg: 1.311 ± 0.777  | 2.623CysSer: 2.623 ± 0.806  | 0.525CysThr: 0.525 ± 0.259  | 1.574CysVal: 1.574 ± 0.857  | 0.262CysTrp: 0.262 ± 0.607  | 1.049CysTyr: 1.049 ± 0.414  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 2.623AspAla: 2.623 ± 0.735  | 1.574AspCys: 1.574 ± 0.857  | 3.409AspAsp: 3.409 ± 0.832  | 2.36AspGlu: 2.36 ± 0.759  | 2.885AspPhe: 2.885 ± 0.844  | 4.983AspGly: 4.983 ± 0.885  | 1.049AspHis: 1.049 ± 0.519  | 4.983AspIle: 4.983 ± 0.664  | 3.672AspLys: 3.672 ± 0.547  | 6.557AspLeu: 6.557 ± 0.906  | 2.098AspMet: 2.098 ± 0.572  | 3.147AspAsn: 3.147 ± 1.049  | 2.885AspPro: 2.885 ± 0.963  | 1.836AspGln: 1.836 ± 0.743  | 2.098AspArg: 2.098 ± 0.684  | 4.458AspSer: 4.458 ± 0.909  | 2.098AspThr: 2.098 ± 0.646  | 4.196AspVal: 4.196 ± 0.945  | 1.049AspTrp: 1.049 ± 0.571  | 1.574AspTyr: 1.574 ± 0.544  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 4.458GluAla: 4.458 ± 0.971  | 1.049GluCys: 1.049 ± 0.803  | 2.885GluAsp: 2.885 ± 0.812  | 3.409GluGlu: 3.409 ± 1.322  | 2.623GluPhe: 2.623 ± 0.664  | 2.623GluGly: 2.623 ± 0.927  | 0.525GluHis: 0.525 ± 0.299  | 4.721GluIle: 4.721 ± 1.064  | 4.196GluLys: 4.196 ± 0.671  | 4.458GluLeu: 4.458 ± 1.124  | 1.574GluMet: 1.574 ± 0.679  | 1.574GluAsn: 1.574 ± 0.63  | 2.098GluPro: 2.098 ± 0.717  | 1.574GluGln: 1.574 ± 0.859  | 2.36GluArg: 2.36 ± 0.618  | 5.77GluSer: 5.77 ± 0.959  | 2.885GluThr: 2.885 ± 0.707  | 4.721GluVal: 4.721 ± 1.182  | 1.836GluTrp: 1.836 ± 0.602  | 1.574GluTyr: 1.574 ± 0.679  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 1.836PheAla: 1.836 ± 0.544  | 1.049PheCys: 1.049 ± 0.468  | 1.049PheAsp: 1.049 ± 0.514  | 1.311PheGlu: 1.311 ± 0.633  | 1.311PhePhe: 1.311 ± 0.57  | 1.836PheGly: 1.836 ± 0.653  | 1.049PheHis: 1.049 ± 0.556  | 2.36PheIle: 2.36 ± 0.723  | 2.885PheLys: 2.885 ± 0.405  | 3.409PheLeu: 3.409 ± 0.673  | 1.574PheMet: 1.574 ± 0.469  | 1.574PheAsn: 1.574 ± 0.551  | 2.36PhePro: 2.36 ± 1.066  | 0.787PheGln: 0.787 ± 0.544  | 2.098PheArg: 2.098 ± 0.663  | 3.409PheSer: 3.409 ± 0.537  | 3.409PheThr: 3.409 ± 1.292  | 2.098PheVal: 2.098 ± 0.576  | 0.262PheTrp: 0.262 ± 0.352  | 0.787PheTyr: 0.787 ± 0.44  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 3.934GlyAla: 3.934 ± 1.393  | 1.311GlyCys: 1.311 ± 0.777  | 2.885GlyAsp: 2.885 ± 1.071  | 2.885GlyGlu: 2.885 ± 1.197  | 2.36GlyPhe: 2.36 ± 0.652  | 3.934GlyGly: 3.934 ± 2.614  | 2.36GlyHis: 2.36 ± 0.821  | 2.098GlyIle: 2.098 ± 1.002  | 4.196GlyLys: 4.196 ± 1.069  | 5.507GlyLeu: 5.507 ± 1.434  | 2.623GlyMet: 2.623 ± 0.943  | 2.36GlyAsn: 2.36 ± 0.779  | 1.574GlyPro: 1.574 ± 0.986  | 1.311GlyGln: 1.311 ± 0.6  | 3.672GlyArg: 3.672 ± 0.439  | 5.77GlySer: 5.77 ± 0.8  | 2.098GlyThr: 2.098 ± 0.467  | 4.196GlyVal: 4.196 ± 1.365  | 0.525GlyTrp: 0.525 ± 0.299  | 2.623GlyTyr: 2.623 ± 0.571  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 0.787HisAla: 0.787 ± 0.315  | 0.0HisCys: 0.0 ± 0.0  | 1.836HisAsp: 1.836 ± 0.529  | 0.262HisGlu: 0.262 ± 0.352  | 1.049HisPhe: 1.049 ± 0.414  | 1.574HisGly: 1.574 ± 0.551  | 1.049HisHis: 1.049 ± 0.414  | 1.049HisIle: 1.049 ± 0.414  | 1.574HisLys: 1.574 ± 0.672  | 2.36HisLeu: 2.36 ± 0.835  | 1.311HisMet: 1.311 ± 0.554  | 1.049HisAsn: 1.049 ± 0.442  | 1.049HisPro: 1.049 ± 0.594  | 0.525HisGln: 0.525 ± 0.557  | 0.787HisArg: 0.787 ± 0.315  | 1.836HisSer: 1.836 ± 0.602  | 0.0HisThr: 0.0 ± 0.0  | 1.574HisVal: 1.574 ± 0.727  | 0.0HisTrp: 0.0 ± 0.0  | 0.787HisTyr: 0.787 ± 1.155  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 2.885IleAla: 2.885 ± 1.825  | 0.525IleCys: 0.525 ± 0.259  | 2.623IleAsp: 2.623 ± 1.064  | 3.934IleGlu: 3.934 ± 1.025  | 2.098IlePhe: 2.098 ± 0.665  | 3.934IleGly: 3.934 ± 1.015  | 2.098IleHis: 2.098 ± 0.873  | 4.458IleIle: 4.458 ± 1.41  | 3.672IleLys: 3.672 ± 1.502  | 5.245IleLeu: 5.245 ± 1.397  | 2.623IleMet: 2.623 ± 0.861  | 2.885IleAsn: 2.885 ± 0.853  | 2.623IlePro: 2.623 ± 1.037  | 2.885IleGln: 2.885 ± 0.685  | 3.934IleArg: 3.934 ± 1.283  | 6.557IleSer: 6.557 ± 1.161  | 2.623IleThr: 2.623 ± 0.79  | 3.409IleVal: 3.409 ± 0.537  | 0.525IleTrp: 0.525 ± 0.259  | 3.672IleTyr: 3.672 ± 0.68  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 3.934LysAla: 3.934 ± 1.479  | 1.049LysCys: 1.049 ± 0.468  | 2.623LysAsp: 2.623 ± 1.615  | 4.196LysGlu: 4.196 ± 1.541  | 1.311LysPhe: 1.311 ± 1.171  | 1.836LysGly: 1.836 ± 0.538  | 1.574LysHis: 1.574 ± 0.429  | 6.557LysIle: 6.557 ± 0.989  | 3.409LysLys: 3.409 ± 1.094  | 6.032LysLeu: 6.032 ± 1.198  | 3.672LysMet: 3.672 ± 0.844  | 3.934LysAsn: 3.934 ± 1.22  | 3.672LysPro: 3.672 ± 1.382  | 2.098LysGln: 2.098 ± 0.881  | 1.574LysArg: 1.574 ± 0.672  | 4.983LysSer: 4.983 ± 1.587  | 2.885LysThr: 2.885 ± 0.476  | 4.721LysVal: 4.721 ± 1.406  | 0.525LysTrp: 0.525 ± 0.259  | 2.098LysTyr: 2.098 ± 0.593  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 6.032LeuAla: 6.032 ± 1.564  | 3.409LeuCys: 3.409 ± 1.043  | 5.507LeuAsp: 5.507 ± 1.006  | 5.245LeuGlu: 5.245 ± 0.692  | 4.196LeuPhe: 4.196 ± 0.733  | 4.721LeuGly: 4.721 ± 0.71  | 1.836LeuHis: 1.836 ± 0.571  | 4.721LeuIle: 4.721 ± 1.209  | 5.507LeuLys: 5.507 ± 0.946  | 9.704LeuLeu: 9.704 ± 2.345  | 3.672LeuMet: 3.672 ± 0.82  | 3.147LeuAsn: 3.147 ± 0.648  | 3.672LeuPro: 3.672 ± 1.318  | 1.574LeuGln: 1.574 ± 0.999  | 4.458LeuArg: 4.458 ± 1.721  | 9.966LeuSer: 9.966 ± 1.807  | 5.77LeuThr: 5.77 ± 1.4  | 4.196LeuVal: 4.196 ± 0.835  | 1.574LeuTrp: 1.574 ± 0.891  | 3.672LeuTyr: 3.672 ± 1.301  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 2.36MetAla: 2.36 ± 0.748  | 0.525MetCys: 0.525 ± 0.297  | 2.098MetAsp: 2.098 ± 0.872  | 1.574MetGlu: 1.574 ± 0.818  | 2.36MetPhe: 2.36 ± 1.336  | 1.836MetGly: 1.836 ± 0.686  | 1.311MetHis: 1.311 ± 0.538  | 2.885MetIle: 2.885 ± 0.893  | 0.787MetLys: 0.787 ± 0.544  | 2.36MetLeu: 2.36 ± 1.164  | 0.787MetMet: 0.787 ± 0.746  | 1.574MetAsn: 1.574 ± 0.672  | 2.36MetPro: 2.36 ± 0.91  | 0.787MetGln: 0.787 ± 0.315  | 4.196MetArg: 4.196 ± 1.233  | 3.147MetSer: 3.147 ± 0.857  | 2.36MetThr: 2.36 ± 1.066  | 2.36MetVal: 2.36 ± 0.975  | 0.525MetTrp: 0.525 ± 0.449  | 0.262MetTyr: 0.262 ± 0.285  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 2.098AsnAla: 2.098 ± 0.724  | 0.787AsnCys: 0.787 ± 0.312  | 3.672AsnAsp: 3.672 ± 1.323  | 2.623AsnGlu: 2.623 ± 0.652  | 1.836AsnPhe: 1.836 ± 0.812  | 2.36AsnGly: 2.36 ± 0.656  | 0.787AsnHis: 0.787 ± 0.548  | 1.836AsnIle: 1.836 ± 1.299  | 1.049AsnLys: 1.049 ± 0.803  | 4.458AsnLeu: 4.458 ± 0.717  | 1.311AsnMet: 1.311 ± 0.756  | 0.787AsnAsn: 0.787 ± 0.381  | 2.36AsnPro: 2.36 ± 0.779  | 1.836AsnGln: 1.836 ± 0.601  | 1.311AsnArg: 1.311 ± 0.537  | 2.885AsnSer: 2.885 ± 0.908  | 1.574AsnThr: 1.574 ± 0.544  | 2.36AsnVal: 2.36 ± 0.756  | 0.525AsnTrp: 0.525 ± 0.297  | 0.787AsnTyr: 0.787 ± 0.312  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 1.574ProAla: 1.574 ± 1.129  | 0.262ProCys: 0.262 ± 0.607  | 4.196ProAsp: 4.196 ± 0.953  | 1.836ProGlu: 1.836 ± 0.544  | 0.787ProPhe: 0.787 ± 0.494  | 1.836ProGly: 1.836 ± 1.109  | 0.787ProHis: 0.787 ± 0.312  | 2.36ProIle: 2.36 ± 0.791  | 3.147ProLys: 3.147 ± 0.557  | 4.196ProLeu: 4.196 ± 1.291  | 1.311ProMet: 1.311 ± 0.472  | 2.36ProAsn: 2.36 ± 0.779  | 1.574ProPro: 1.574 ± 0.727  | 2.098ProGln: 2.098 ± 0.528  | 3.147ProArg: 3.147 ± 1.027  | 4.721ProSer: 4.721 ± 2.074  | 3.672ProThr: 3.672 ± 1.061  | 3.147ProVal: 3.147 ± 1.619  | 0.0ProTrp: 0.0 ± 0.0  | 2.098ProTyr: 2.098 ± 0.828  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 3.147GlnAla: 3.147 ± 1.775  | 0.525GlnCys: 0.525 ± 0.259  | 0.787GlnAsp: 0.787 ± 0.609  | 2.36GlnGlu: 2.36 ± 0.678  | 1.049GlnPhe: 1.049 ± 0.519  | 0.262GlnGly: 0.262 ± 0.352  | 0.0GlnHis: 0.0 ± 0.0  | 2.36GlnIle: 2.36 ± 1.049  | 2.098GlnLys: 2.098 ± 1.612  | 2.885GlnLeu: 2.885 ± 0.581  | 0.525GlnMet: 0.525 ± 0.557  | 0.787GlnAsn: 0.787 ± 0.312  | 2.098GlnPro: 2.098 ± 1.346  | 0.525GlnGln: 0.525 ± 0.704  | 2.098GlnArg: 2.098 ± 0.909  | 2.36GlnSer: 2.36 ± 0.656  | 2.098GlnThr: 2.098 ± 0.927  | 2.623GlnVal: 2.623 ± 1.034  | 0.525GlnTrp: 0.525 ± 0.299  | 0.787GlnTyr: 0.787 ± 0.664  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 2.885ArgAla: 2.885 ± 1.046  | 2.098ArgCys: 2.098 ± 0.513  | 3.147ArgAsp: 3.147 ± 0.592  | 3.409ArgGlu: 3.409 ± 1.068  | 1.574ArgPhe: 1.574 ± 0.634  | 2.885ArgGly: 2.885 ± 0.701  | 0.787ArgHis: 0.787 ± 0.445  | 2.098ArgIle: 2.098 ± 0.739  | 3.147ArgLys: 3.147 ± 0.777  | 5.77ArgLeu: 5.77 ± 1.973  | 2.36ArgMet: 2.36 ± 1.04  | 1.574ArgAsn: 1.574 ± 0.544  | 2.098ArgPro: 2.098 ± 0.591  | 2.098ArgGln: 2.098 ± 0.782  | 4.458ArgArg: 4.458 ± 1.845  | 6.294ArgSer: 6.294 ± 2.365  | 3.147ArgThr: 3.147 ± 1.473  | 1.574ArgVal: 1.574 ± 0.469  | 1.049ArgTrp: 1.049 ± 0.414  | 2.36ArgTyr: 2.36 ± 1.04  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 4.721SerAla: 4.721 ± 1.792  | 2.098SerCys: 2.098 ± 0.786  | 6.819SerAsp: 6.819 ± 0.594  | 4.983SerGlu: 4.983 ± 1.181  | 4.196SerPhe: 4.196 ± 1.464  | 6.819SerGly: 6.819 ± 1.308  | 0.525SerHis: 0.525 ± 0.297  | 4.458SerIle: 4.458 ± 1.646  | 7.868SerLys: 7.868 ± 1.96  | 7.868SerLeu: 7.868 ± 1.424  | 2.885SerMet: 2.885 ± 0.722  | 2.36SerAsn: 2.36 ± 1.06  | 4.196SerPro: 4.196 ± 0.324  | 3.934SerGln: 3.934 ± 1.231  | 6.032SerArg: 6.032 ± 1.643  | 7.868SerSer: 7.868 ± 1.692  | 5.507SerThr: 5.507 ± 1.487  | 6.294SerVal: 6.294 ± 0.895  | 1.836SerTrp: 1.836 ± 0.595  | 3.672SerTyr: 3.672 ± 0.518  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 2.885ThrAla: 2.885 ± 1.03  | 0.525ThrCys: 0.525 ± 0.259  | 3.934ThrAsp: 3.934 ± 0.648  | 4.458ThrGlu: 4.458 ± 1.116  | 1.836ThrPhe: 1.836 ± 0.812  | 3.934ThrGly: 3.934 ± 0.996  | 0.787ThrHis: 0.787 ± 0.524  | 4.196ThrIle: 4.196 ± 1.125  | 3.409ThrLys: 3.409 ± 1.059  | 4.458ThrLeu: 4.458 ± 0.856  | 2.36ThrMet: 2.36 ± 0.764  | 1.836ThrAsn: 1.836 ± 0.688  | 1.311ThrPro: 1.311 ± 0.596  | 1.836ThrGln: 1.836 ± 1.287  | 2.36ThrArg: 2.36 ± 0.71  | 3.934ThrSer: 3.934 ± 1.113  | 2.098ThrThr: 2.098 ± 0.591  | 4.983ThrVal: 4.983 ± 1.098  | 1.049ThrTrp: 1.049 ± 0.391  | 2.623ThrTyr: 2.623 ± 0.805  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 3.934ValAla: 3.934 ± 1.084  | 1.574ValCys: 1.574 ± 0.299  | 2.885ValAsp: 2.885 ± 1.123  | 3.672ValGlu: 3.672 ± 1.263  | 1.574ValPhe: 1.574 ± 0.593  | 4.721ValGly: 4.721 ± 1.67  | 2.098ValHis: 2.098 ± 1.676  | 2.885ValIle: 2.885 ± 1.297  | 4.458ValLys: 4.458 ± 2.843  | 6.819ValLeu: 6.819 ± 1.968  | 2.885ValMet: 2.885 ± 0.861  | 1.311ValAsn: 1.311 ± 0.411  | 2.623ValPro: 2.623 ± 0.576  | 1.311ValGln: 1.311 ± 0.6  | 4.458ValArg: 4.458 ± 1.646  | 7.343ValSer: 7.343 ± 3.627  | 5.245ValThr: 5.245 ± 0.984  | 4.458ValVal: 4.458 ± 0.851  | 0.787ValTrp: 0.787 ± 0.315  | 2.36ValTyr: 2.36 ± 0.524  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.262TrpAla: 0.262 ± 0.285  | 0.262TrpCys: 0.262 ± 0.148  | 1.311TrpAsp: 1.311 ± 0.349  | 0.525TrpGlu: 0.525 ± 0.297  | 0.525TrpPhe: 0.525 ± 0.557  | 1.311TrpGly: 1.311 ± 0.633  | 0.0TrpHis: 0.0 ± 0.0  | 2.098TrpIle: 2.098 ± 0.633  | 0.525TrpLys: 0.525 ± 0.449  | 1.311TrpLeu: 1.311 ± 0.349  | 0.525TrpMet: 0.525 ± 0.293  | 0.525TrpAsn: 0.525 ± 0.297  | 0.262TrpPro: 0.262 ± 0.285  | 0.0TrpGln: 0.0 ± 0.0  | 0.787TrpArg: 0.787 ± 0.445  | 1.049TrpSer: 1.049 ± 0.571  | 0.787TrpThr: 0.787 ± 0.445  | 1.049TrpVal: 1.049 ± 0.598  | 0.262TrpTrp: 0.262 ± 0.148  | 0.262TrpTyr: 0.262 ± 0.352  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 2.098TyrAla: 2.098 ± 0.464  | 1.049TyrCys: 1.049 ± 0.442  | 2.098TyrAsp: 2.098 ± 0.591  | 2.885TyrGlu: 2.885 ± 0.907  | 0.787TyrPhe: 0.787 ± 0.977  | 2.098TyrGly: 2.098 ± 0.45  | 0.787TyrHis: 0.787 ± 0.44  | 1.836TyrIle: 1.836 ± 0.538  | 3.409TyrLys: 3.409 ± 2.031  | 3.409TyrLeu: 3.409 ± 1.618  | 0.525TyrMet: 0.525 ± 0.297  | 1.311TyrAsn: 1.311 ± 0.349  | 2.623TyrPro: 2.623 ± 0.736  | 0.787TyrGln: 0.787 ± 0.315  | 1.049TyrArg: 1.049 ± 0.571  | 3.409TyrSer: 3.409 ± 0.895  | 2.623TyrThr: 2.623 ± 0.634  | 2.623TyrVal: 2.623 ± 0.861  | 0.262TyrTrp: 0.262 ± 0.285  | 1.049TyrTyr: 1.049 ± 0.372  | 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 |