
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 | 3.148AlaAla: 3.148 ± 1.737  | 0.0AlaCys: 0.0 ± 0.0  | 4.197AlaAsp: 4.197 ± 1.707  | 3.148AlaGlu: 3.148 ± 1.392  | 2.099AlaPhe: 2.099 ± 1.007  | 6.296AlaGly: 6.296 ± 2.862  | 0.0AlaHis: 0.0 ± 0.0  | 2.623AlaIle: 2.623 ± 1.059  | 4.197AlaLys: 4.197 ± 1.301  | 5.247AlaLeu: 5.247 ± 1.176  | 0.525AlaMet: 0.525 ± 0.42  | 3.148AlaAsn: 3.148 ± 0.944  | 0.525AlaPro: 0.525 ± 0.434  | 1.049AlaGln: 1.049 ± 0.729  | 1.574AlaArg: 1.574 ± 0.819  | 6.296AlaSer: 6.296 ± 1.939  | 3.673AlaThr: 3.673 ± 1.945  | 6.296AlaVal: 6.296 ± 1.282  | 0.0AlaTrp: 0.0 ± 0.0  | 2.099AlaTyr: 2.099 ± 0.861  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.525CysAla: 0.525 ± 0.434  | 1.049CysCys: 1.049 ± 0.917  | 0.0CysAsp: 0.0 ± 0.0  | 0.525CysGlu: 0.525 ± 0.42  | 0.525CysPhe: 0.525 ± 0.42  | 1.574CysGly: 1.574 ± 0.667  | 0.525CysHis: 0.525 ± 0.42  | 2.099CysIle: 2.099 ± 1.303  | 1.049CysLys: 1.049 ± 0.695  | 1.049CysLeu: 1.049 ± 0.504  | 0.0CysMet: 0.0 ± 0.0  | 1.574CysAsn: 1.574 ± 1.259  | 3.148CysPro: 3.148 ± 1.345  | 0.525CysGln: 0.525 ± 0.429  | 1.574CysArg: 1.574 ± 1.328  | 1.049CysSer: 1.049 ± 0.839  | 0.525CysThr: 0.525 ± 0.429  | 1.049CysVal: 1.049 ± 0.722  | 0.0CysTrp: 0.0 ± 0.0  | 0.525CysTyr: 0.525 ± 0.42  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 3.673AspAla: 3.673 ± 2.074  | 0.525AspCys: 0.525 ± 0.42  | 4.197AspAsp: 4.197 ± 1.441  | 5.247AspGlu: 5.247 ± 1.524  | 3.673AspPhe: 3.673 ± 1.536  | 3.148AspGly: 3.148 ± 1.071  | 1.574AspHis: 1.574 ± 0.781  | 3.148AspIle: 3.148 ± 0.75  | 3.148AspLys: 3.148 ± 0.751  | 5.771AspLeu: 5.771 ± 2.092  | 1.049AspMet: 1.049 ± 0.7  | 2.623AspAsn: 2.623 ± 0.865  | 3.148AspPro: 3.148 ± 1.258  | 1.574AspGln: 1.574 ± 1.402  | 0.525AspArg: 0.525 ± 0.557  | 3.673AspSer: 3.673 ± 1.19  | 3.148AspThr: 3.148 ± 1.118  | 5.771AspVal: 5.771 ± 1.639  | 1.049AspTrp: 1.049 ± 0.504  | 0.525AspTyr: 0.525 ± 0.434  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 1.049GluAla: 1.049 ± 0.867  | 1.574GluCys: 1.574 ± 0.761  | 2.099GluAsp: 2.099 ± 1.188  | 2.099GluGlu: 2.099 ± 0.877  | 3.148GluPhe: 3.148 ± 1.096  | 6.821GluGly: 6.821 ± 2.524  | 1.574GluHis: 1.574 ± 0.401  | 4.722GluIle: 4.722 ± 2.184  | 4.722GluLys: 4.722 ± 1.179  | 5.247GluLeu: 5.247 ± 2.156  | 3.148GluMet: 3.148 ± 1.379  | 1.574GluAsn: 1.574 ± 0.781  | 2.099GluPro: 2.099 ± 0.815  | 1.574GluGln: 1.574 ± 0.807  | 3.673GluArg: 3.673 ± 1.29  | 5.771GluSer: 5.771 ± 1.739  | 5.247GluThr: 5.247 ± 1.087  | 7.345GluVal: 7.345 ± 1.578  | 1.049GluTrp: 1.049 ± 0.831  | 0.525GluTyr: 0.525 ± 0.522  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 0.525PheAla: 0.525 ± 0.42  | 0.0PheCys: 0.0 ± 0.0  | 1.049PheAsp: 1.049 ± 0.831  | 2.623PheGlu: 2.623 ± 1.006  | 0.525PhePhe: 0.525 ± 0.429  | 3.673PheGly: 3.673 ± 1.438  | 1.574PheHis: 1.574 ± 0.807  | 2.099PheIle: 2.099 ± 1.55  | 4.722PheLys: 4.722 ± 0.918  | 4.722PheLeu: 4.722 ± 1.377  | 1.049PheMet: 1.049 ± 0.786  | 1.049PheAsn: 1.049 ± 0.491  | 1.049PhePro: 1.049 ± 1.044  | 2.099PheGln: 2.099 ± 1.184  | 2.623PheArg: 2.623 ± 0.909  | 7.345PheSer: 7.345 ± 1.733  | 1.574PheThr: 1.574 ± 0.863  | 1.049PheVal: 1.049 ± 0.985  | 0.0PheTrp: 0.0 ± 0.0  | 1.049PheTyr: 1.049 ± 0.504  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 3.148GlyAla: 3.148 ± 0.731  | 1.574GlyCys: 1.574 ± 0.89  | 5.771GlyAsp: 5.771 ± 0.906  | 3.673GlyGlu: 3.673 ± 1.163  | 2.099GlyPhe: 2.099 ± 0.756  | 3.148GlyGly: 3.148 ± 1.089  | 0.525GlyHis: 0.525 ± 0.434  | 7.87GlyIle: 7.87 ± 2.101  | 4.722GlyLys: 4.722 ± 1.038  | 3.148GlyLeu: 3.148 ± 0.673  | 3.673GlyMet: 3.673 ± 2.054  | 2.099GlyAsn: 2.099 ± 1.24  | 0.525GlyPro: 0.525 ± 0.557  | 2.099GlyGln: 2.099 ± 0.991  | 3.148GlyArg: 3.148 ± 1.605  | 5.771GlySer: 5.771 ± 1.477  | 3.148GlyThr: 3.148 ± 1.035  | 4.197GlyVal: 4.197 ± 1.695  | 0.525GlyTrp: 0.525 ± 0.434  | 3.673GlyTyr: 3.673 ± 0.831  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 0.525HisAla: 0.525 ± 0.434  | 0.525HisCys: 0.525 ± 0.42  | 0.525HisAsp: 0.525 ± 0.434  | 0.525HisGlu: 0.525 ± 0.42  | 0.525HisPhe: 0.525 ± 0.522  | 0.525HisGly: 0.525 ± 0.429  | 0.525HisHis: 0.525 ± 0.429  | 0.525HisIle: 0.525 ± 0.429  | 0.525HisLys: 0.525 ± 0.434  | 3.673HisLeu: 3.673 ± 0.992  | 0.525HisMet: 0.525 ± 0.429  | 1.049HisAsn: 1.049 ± 0.839  | 0.525HisPro: 0.525 ± 0.42  | 1.574HisGln: 1.574 ± 0.819  | 0.0HisArg: 0.0 ± 0.0  | 0.525HisSer: 0.525 ± 0.42  | 0.525HisThr: 0.525 ± 0.434  | 1.574HisVal: 1.574 ± 1.083  | 0.0HisTrp: 0.0 ± 0.0  | 0.0HisTyr: 0.0 ± 0.0  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 2.623IleAla: 2.623 ± 0.674  | 0.0IleCys: 0.0 ± 0.0  | 2.099IleAsp: 2.099 ± 1.153  | 5.247IleGlu: 5.247 ± 1.283  | 3.673IlePhe: 3.673 ± 1.32  | 4.722IleGly: 4.722 ± 1.507  | 0.525IleHis: 0.525 ± 0.42  | 3.148IleIle: 3.148 ± 1.038  | 4.722IleLys: 4.722 ± 1.375  | 3.673IleLeu: 3.673 ± 1.914  | 2.099IleMet: 2.099 ± 0.819  | 2.623IleAsn: 2.623 ± 1.15  | 3.148IlePro: 3.148 ± 1.657  | 0.525IleGln: 0.525 ± 0.429  | 3.673IleArg: 3.673 ± 1.537  | 11.542IleSer: 11.542 ± 2.596  | 8.395IleThr: 8.395 ± 2.132  | 5.247IleVal: 5.247 ± 0.758  | 0.525IleTrp: 0.525 ± 0.42  | 3.673IleTyr: 3.673 ± 0.766  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 5.247LysAla: 5.247 ± 1.153  | 1.574LysCys: 1.574 ± 0.401  | 3.673LysAsp: 3.673 ± 1.005  | 5.771LysGlu: 5.771 ± 1.617  | 3.673LysPhe: 3.673 ± 1.279  | 4.197LysGly: 4.197 ± 1.995  | 1.049LysHis: 1.049 ± 0.839  | 4.722LysIle: 4.722 ± 1.794  | 6.821LysLys: 6.821 ± 2.87  | 6.821LysLeu: 6.821 ± 1.665  | 2.623LysMet: 2.623 ± 1.089  | 4.197LysAsn: 4.197 ± 1.569  | 2.099LysPro: 2.099 ± 0.877  | 2.623LysGln: 2.623 ± 1.207  | 3.673LysArg: 3.673 ± 1.697  | 5.247LysSer: 5.247 ± 1.316  | 3.148LysThr: 3.148 ± 1.21  | 5.247LysVal: 5.247 ± 2.01  | 0.0LysTrp: 0.0 ± 0.0  | 2.099LysTyr: 2.099 ± 1.233  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 2.623LeuAla: 2.623 ± 1.279  | 0.525LeuCys: 0.525 ± 0.42  | 6.296LeuAsp: 6.296 ± 2.214  | 6.296LeuGlu: 6.296 ± 1.258  | 5.247LeuPhe: 5.247 ± 1.234  | 4.197LeuGly: 4.197 ± 1.094  | 1.049LeuHis: 1.049 ± 0.576  | 7.87LeuIle: 7.87 ± 1.336  | 5.247LeuLys: 5.247 ± 1.132  | 5.771LeuLeu: 5.771 ± 2.34  | 2.099LeuMet: 2.099 ± 0.917  | 2.099LeuAsn: 2.099 ± 0.932  | 3.148LeuPro: 3.148 ± 1.131  | 2.099LeuGln: 2.099 ± 1.33  | 3.148LeuArg: 3.148 ± 1.414  | 13.116LeuSer: 13.116 ± 2.907  | 4.197LeuThr: 4.197 ± 1.546  | 7.345LeuVal: 7.345 ± 1.33  | 0.0LeuTrp: 0.0 ± 0.0  | 0.0LeuTyr: 0.0 ± 0.0  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 3.148MetAla: 3.148 ± 1.263  | 0.0MetCys: 0.0 ± 0.0  | 1.574MetAsp: 1.574 ± 0.777  | 0.0MetGlu: 0.0 ± 0.0  | 0.525MetPhe: 0.525 ± 0.67  | 2.099MetGly: 2.099 ± 1.172  | 0.525MetHis: 0.525 ± 0.434  | 4.197MetIle: 4.197 ± 1.698  | 3.148MetLys: 3.148 ± 0.8  | 1.574MetLeu: 1.574 ± 0.665  | 0.0MetMet: 0.0 ± 0.41  | 0.525MetAsn: 0.525 ± 0.522  | 0.525MetPro: 0.525 ± 0.67  | 1.049MetGln: 1.049 ± 0.504  | 1.574MetArg: 1.574 ± 0.678  | 4.197MetSer: 4.197 ± 0.973  | 1.049MetThr: 1.049 ± 0.794  | 1.574MetVal: 1.574 ± 0.994  | 0.525MetTrp: 0.525 ± 0.67  | 1.049MetTyr: 1.049 ± 0.463  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 2.623AsnAla: 2.623 ± 0.809  | 1.049AsnCys: 1.049 ± 0.504  | 2.623AsnAsp: 2.623 ± 0.853  | 5.247AsnGlu: 5.247 ± 1.269  | 2.099AsnPhe: 2.099 ± 1.007  | 3.673AsnGly: 3.673 ± 0.94  | 0.0AsnHis: 0.0 ± 0.0  | 2.099AsnIle: 2.099 ± 0.861  | 2.099AsnLys: 2.099 ± 0.678  | 2.623AsnLeu: 2.623 ± 0.599  | 1.574AsnMet: 1.574 ± 0.641  | 1.574AsnAsn: 1.574 ± 1.259  | 1.574AsnPro: 1.574 ± 1.206  | 1.574AsnGln: 1.574 ± 0.89  | 0.0AsnArg: 0.0 ± 0.0  | 1.049AsnSer: 1.049 ± 0.605  | 1.049AsnThr: 1.049 ± 0.463  | 2.099AsnVal: 2.099 ± 0.521  | 0.0AsnTrp: 0.0 ± 0.0  | 2.099AsnTyr: 2.099 ± 0.536  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 4.197ProAla: 4.197 ± 1.351  | 0.525ProCys: 0.525 ± 0.67  | 1.574ProAsp: 1.574 ± 1.024  | 4.197ProGlu: 4.197 ± 1.419  | 0.0ProPhe: 0.0 ± 0.0  | 0.525ProGly: 0.525 ± 0.522  | 0.0ProHis: 0.0 ± 0.0  | 3.148ProIle: 3.148 ± 0.999  | 3.148ProLys: 3.148 ± 1.378  | 2.623ProLeu: 2.623 ± 0.711  | 1.049ProMet: 1.049 ± 0.538  | 1.574ProAsn: 1.574 ± 0.679  | 1.574ProPro: 1.574 ± 0.673  | 1.574ProGln: 1.574 ± 1.301  | 2.099ProArg: 2.099 ± 2.683  | 1.049ProSer: 1.049 ± 0.605  | 3.148ProThr: 3.148 ± 0.887  | 2.623ProVal: 2.623 ± 1.09  | 0.525ProTrp: 0.525 ± 0.42  | 2.623ProTyr: 2.623 ± 0.672  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 1.049GlnAla: 1.049 ± 0.867  | 1.574GlnCys: 1.574 ± 0.763  | 2.099GlnAsp: 2.099 ± 0.661  | 3.148GlnGlu: 3.148 ± 1.682  | 0.525GlnPhe: 0.525 ± 0.42  | 2.099GlnGly: 2.099 ± 0.815  | 0.525GlnHis: 0.525 ± 0.522  | 1.574GlnIle: 1.574 ± 0.761  | 3.673GlnLys: 3.673 ± 1.177  | 1.049GlnLeu: 1.049 ± 0.695  | 1.049GlnMet: 1.049 ± 0.648  | 0.0GlnAsn: 0.0 ± 0.0  | 0.0GlnPro: 0.0 ± 0.0  | 1.049GlnGln: 1.049 ± 0.867  | 1.049GlnArg: 1.049 ± 0.867  | 3.673GlnSer: 3.673 ± 1.29  | 1.574GlnThr: 1.574 ± 0.788  | 1.574GlnVal: 1.574 ± 0.674  | 0.525GlnTrp: 0.525 ± 0.434  | 0.525GlnTyr: 0.525 ± 0.434  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 3.148ArgAla: 3.148 ± 1.17  | 1.049ArgCys: 1.049 ± 0.695  | 2.099ArgAsp: 2.099 ± 1.304  | 3.148ArgGlu: 3.148 ± 1.129  | 2.623ArgPhe: 2.623 ± 1.09  | 2.623ArgGly: 2.623 ± 2.058  | 1.049ArgHis: 1.049 ± 0.792  | 2.623ArgIle: 2.623 ± 1.197  | 2.099ArgLys: 2.099 ± 0.926  | 4.722ArgLeu: 4.722 ± 1.976  | 1.049ArgMet: 1.049 ± 0.798  | 1.574ArgAsn: 1.574 ± 0.801  | 1.574ArgPro: 1.574 ± 0.777  | 0.525ArgGln: 0.525 ± 0.42  | 3.148ArgArg: 3.148 ± 1.159  | 4.197ArgSer: 4.197 ± 1.114  | 2.099ArgThr: 2.099 ± 0.853  | 4.197ArgVal: 4.197 ± 1.258  | 0.0ArgTrp: 0.0 ± 0.0  | 2.623ArgTyr: 2.623 ± 1.52  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 4.722SerAla: 4.722 ± 0.981  | 3.673SerCys: 3.673 ± 1.6  | 5.247SerAsp: 5.247 ± 1.199  | 6.296SerGlu: 6.296 ± 1.4  | 4.197SerPhe: 4.197 ± 1.464  | 4.722SerGly: 4.722 ± 1.5  | 1.049SerHis: 1.049 ± 0.491  | 8.395SerIle: 8.395 ± 2.591  | 5.247SerLys: 5.247 ± 1.565  | 8.395SerLeu: 8.395 ± 1.745  | 2.623SerMet: 2.623 ± 0.912  | 4.722SerAsn: 4.722 ± 2.007  | 5.771SerPro: 5.771 ± 1.842  | 2.099SerGln: 2.099 ± 1.007  | 4.722SerArg: 4.722 ± 1.361  | 3.673SerSer: 3.673 ± 1.37  | 5.247SerThr: 5.247 ± 2.448  | 7.87SerVal: 7.87 ± 2.134  | 2.623SerTrp: 2.623 ± 1.192  | 1.049SerTyr: 1.049 ± 0.702  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 2.099ThrAla: 2.099 ± 1.184  | 1.049ThrCys: 1.049 ± 0.839  | 5.247ThrAsp: 5.247 ± 1.033  | 3.673ThrGlu: 3.673 ± 1.028  | 2.099ThrPhe: 2.099 ± 0.677  | 2.623ThrGly: 2.623 ± 1.181  | 1.049ThrHis: 1.049 ± 0.504  | 3.148ThrIle: 3.148 ± 1.073  | 4.722ThrLys: 4.722 ± 1.636  | 5.247ThrLeu: 5.247 ± 1.101  | 1.574ThrMet: 1.574 ± 0.948  | 1.574ThrAsn: 1.574 ± 1.025  | 2.099ThrPro: 2.099 ± 1.254  | 1.574ThrGln: 1.574 ± 0.881  | 3.673ThrArg: 3.673 ± 1.807  | 5.771ThrSer: 5.771 ± 1.291  | 5.247ThrThr: 5.247 ± 1.518  | 4.197ThrVal: 4.197 ± 1.094  | 2.099ThrTrp: 2.099 ± 0.795  | 3.673ThrTyr: 3.673 ± 1.396  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 6.296ValAla: 6.296 ± 1.566  | 2.099ValCys: 2.099 ± 0.853  | 4.197ValAsp: 4.197 ± 1.599  | 2.623ValGlu: 2.623 ± 1.792  | 2.099ValPhe: 2.099 ± 0.894  | 5.771ValGly: 5.771 ± 1.093  | 1.574ValHis: 1.574 ± 0.841  | 4.197ValIle: 4.197 ± 0.938  | 5.771ValLys: 5.771 ± 1.404  | 4.722ValLeu: 4.722 ± 2.116  | 2.099ValMet: 2.099 ± 1.216  | 2.099ValAsn: 2.099 ± 0.946  | 4.722ValPro: 4.722 ± 1.318  | 1.574ValGln: 1.574 ± 0.898  | 5.247ValArg: 5.247 ± 1.16  | 7.87ValSer: 7.87 ± 1.922  | 5.771ValThr: 5.771 ± 1.224  | 6.296ValVal: 6.296 ± 2.144  | 2.623ValTrp: 2.623 ± 1.625  | 1.574ValTyr: 1.574 ± 0.931  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 2.099TrpAla: 2.099 ± 0.901  | 0.0TrpCys: 0.0 ± 0.0  | 1.574TrpAsp: 1.574 ± 0.948  | 0.525TrpGlu: 0.525 ± 0.42  | 0.0TrpPhe: 0.0 ± 0.0  | 0.525TrpGly: 0.525 ± 0.67  | 0.0TrpHis: 0.0 ± 0.0  | 1.049TrpIle: 1.049 ± 0.839  | 1.574TrpLys: 1.574 ± 0.896  | 1.574TrpLeu: 1.574 ± 0.931  | 0.0TrpMet: 0.0 ± 0.0  | 0.525TrpAsn: 0.525 ± 0.434  | 0.0TrpPro: 0.0 ± 0.0  | 0.0TrpGln: 0.0 ± 0.0  | 0.525TrpArg: 0.525 ± 0.42  | 0.0TrpSer: 0.0 ± 0.0  | 0.525TrpThr: 0.525 ± 0.42  | 1.049TrpVal: 1.049 ± 0.463  | 0.0TrpTrp: 0.0 ± 0.0  | 0.525TrpTyr: 0.525 ± 0.42  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 3.673TyrAla: 3.673 ± 1.467  | 0.525TyrCys: 0.525 ± 0.42  | 1.049TyrAsp: 1.049 ± 0.491  | 1.049TyrGlu: 1.049 ± 0.463  | 1.049TyrPhe: 1.049 ± 0.867  | 1.574TyrGly: 1.574 ± 0.679  | 0.0TyrHis: 0.0 ± 0.0  | 2.623TyrIle: 2.623 ± 0.876  | 3.148TyrLys: 3.148 ± 0.831  | 4.722TyrLeu: 4.722 ± 1.432  | 1.049TyrMet: 1.049 ± 0.75  | 0.525TyrAsn: 0.525 ± 0.429  | 0.525TyrPro: 0.525 ± 0.42  | 1.574TyrGln: 1.574 ± 1.127  | 0.525TyrArg: 0.525 ± 0.522  | 0.525TyrSer: 0.525 ± 0.434  | 3.148TyrThr: 3.148 ± 1.21  | 2.623TyrVal: 2.623 ± 1.134  | 0.0TyrTrp: 0.0 ± 0.0  | 0.525TyrTyr: 0.525 ± 0.42  | 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 |