
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 | 7.725AlaAla: 7.725 ± 1.108  | 0.636AlaCys: 0.636 ± 0.269  | 3.544AlaAsp: 3.544 ± 0.552  | 4.09AlaGlu: 4.09 ± 0.672  | 2.636AlaPhe: 2.636 ± 0.361  | 5.907AlaGly: 5.907 ± 0.853  | 1.636AlaHis: 1.636 ± 0.324  | 6.544AlaIle: 6.544 ± 0.665  | 5.453AlaLys: 5.453 ± 0.758  | 7.18AlaLeu: 7.18 ± 0.887  | 2.454AlaMet: 2.454 ± 0.477  | 4.272AlaAsn: 4.272 ± 0.602  | 3.454AlaPro: 3.454 ± 0.687  | 3.09AlaGln: 3.09 ± 0.513  | 4.544AlaArg: 4.544 ± 0.742  | 4.544AlaSer: 4.544 ± 0.678  | 5.907AlaThr: 5.907 ± 0.958  | 4.817AlaVal: 4.817 ± 0.671  | 0.454AlaTrp: 0.454 ± 0.227  | 3.09AlaTyr: 3.09 ± 0.525  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.636CysAla: 0.636 ± 0.246  | 0.091CysCys: 0.091 ± 0.103  | 0.545CysAsp: 0.545 ± 0.204  | 0.454CysGlu: 0.454 ± 0.189  | 0.454CysPhe: 0.454 ± 0.217  | 0.636CysGly: 0.636 ± 0.292  | 0.182CysHis: 0.182 ± 0.154  | 0.545CysIle: 0.545 ± 0.224  | 0.636CysLys: 0.636 ± 0.267  | 0.818CysLeu: 0.818 ± 0.311  | 0.091CysMet: 0.091 ± 0.093  | 0.454CysAsn: 0.454 ± 0.237  | 0.545CysPro: 0.545 ± 0.201  | 0.273CysGln: 0.273 ± 0.147  | 0.454CysArg: 0.454 ± 0.198  | 0.273CysSer: 0.273 ± 0.169  | 0.364CysThr: 0.364 ± 0.182  | 0.727CysVal: 0.727 ± 0.332  | 0.182CysTrp: 0.182 ± 0.115  | 0.364CysTyr: 0.364 ± 0.194  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 4.272AspAla: 4.272 ± 0.599  | 0.636AspCys: 0.636 ± 0.232  | 3.635AspAsp: 3.635 ± 0.573  | 3.817AspGlu: 3.817 ± 0.462  | 2.454AspPhe: 2.454 ± 0.444  | 3.454AspGly: 3.454 ± 0.722  | 1.727AspHis: 1.727 ± 0.489  | 3.908AspIle: 3.908 ± 0.598  | 3.908AspLys: 3.908 ± 0.592  | 5.544AspLeu: 5.544 ± 0.627  | 0.909AspMet: 0.909 ± 0.24  | 2.908AspAsn: 2.908 ± 0.5  | 3.181AspPro: 3.181 ± 0.673  | 1.272AspGln: 1.272 ± 0.305  | 2.545AspArg: 2.545 ± 0.418  | 2.999AspSer: 2.999 ± 0.55  | 3.272AspThr: 3.272 ± 0.494  | 3.817AspVal: 3.817 ± 0.668  | 1.0AspTrp: 1.0 ± 0.268  | 1.818AspTyr: 1.818 ± 0.447  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 5.726GluAla: 5.726 ± 0.74  | 0.545GluCys: 0.545 ± 0.239  | 3.454GluAsp: 3.454 ± 0.622  | 5.18GluGlu: 5.18 ± 0.996  | 4.181GluPhe: 4.181 ± 0.61  | 4.09GluGly: 4.09 ± 0.532  | 1.272GluHis: 1.272 ± 0.327  | 4.181GluIle: 4.181 ± 0.71  | 4.09GluLys: 4.09 ± 0.832  | 7.089GluLeu: 7.089 ± 0.852  | 2.908GluMet: 2.908 ± 0.461  | 2.999GluAsn: 2.999 ± 0.435  | 2.09GluPro: 2.09 ± 0.435  | 2.363GluGln: 2.363 ± 0.453  | 2.272GluArg: 2.272 ± 0.47  | 3.09GluSer: 3.09 ± 0.573  | 3.635GluThr: 3.635 ± 0.556  | 3.09GluVal: 3.09 ± 0.442  | 0.818GluTrp: 0.818 ± 0.315  | 2.09GluTyr: 2.09 ± 0.387  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 2.817PheAla: 2.817 ± 0.464  | 1.0PheCys: 1.0 ± 0.319  | 2.817PheAsp: 2.817 ± 0.535  | 2.181PheGlu: 2.181 ± 0.484  | 2.09PhePhe: 2.09 ± 0.448  | 4.09PheGly: 4.09 ± 0.578  | 0.454PheHis: 0.454 ± 0.199  | 3.09PheIle: 3.09 ± 0.673  | 2.09PheLys: 2.09 ± 0.458  | 3.363PheLeu: 3.363 ± 0.59  | 1.272PheMet: 1.272 ± 0.256  | 2.545PheAsn: 2.545 ± 0.396  | 1.727PhePro: 1.727 ± 0.45  | 2.454PheGln: 2.454 ± 0.476  | 1.909PheArg: 1.909 ± 0.393  | 2.908PheSer: 2.908 ± 0.546  | 2.09PheThr: 2.09 ± 0.38  | 1.999PheVal: 1.999 ± 0.374  | 0.727PheTrp: 0.727 ± 0.244  | 1.181PheTyr: 1.181 ± 0.384  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 4.544GlyAla: 4.544 ± 0.688  | 0.727GlyCys: 0.727 ± 0.281  | 3.908GlyAsp: 3.908 ± 0.69  | 3.635GlyGlu: 3.635 ± 0.534  | 2.181GlyPhe: 2.181 ± 0.483  | 3.544GlyGly: 3.544 ± 0.809  | 0.909GlyHis: 0.909 ± 0.329  | 5.544GlyIle: 5.544 ± 0.59  | 5.362GlyLys: 5.362 ± 0.842  | 4.999GlyLeu: 4.999 ± 0.88  | 2.545GlyMet: 2.545 ± 0.501  | 3.272GlyAsn: 3.272 ± 0.388  | 1.0GlyPro: 1.0 ± 0.278  | 2.363GlyGln: 2.363 ± 0.475  | 3.181GlyArg: 3.181 ± 0.718  | 3.817GlySer: 3.817 ± 0.85  | 5.998GlyThr: 5.998 ± 1.011  | 3.454GlyVal: 3.454 ± 0.588  | 0.909GlyTrp: 0.909 ± 0.289  | 2.908GlyTyr: 2.908 ± 0.502  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.636HisAla: 1.636 ± 0.348  | 0.182HisCys: 0.182 ± 0.134  | 1.0HisAsp: 1.0 ± 0.293  | 1.181HisGlu: 1.181 ± 0.294  | 0.545HisPhe: 0.545 ± 0.187  | 1.818HisGly: 1.818 ± 0.305  | 0.091HisHis: 0.091 ± 0.072  | 1.272HisIle: 1.272 ± 0.383  | 1.0HisLys: 1.0 ± 0.316  | 2.09HisLeu: 2.09 ± 0.431  | 0.636HisMet: 0.636 ± 0.213  | 1.0HisAsn: 1.0 ± 0.342  | 1.454HisPro: 1.454 ± 0.304  | 0.818HisGln: 0.818 ± 0.233  | 0.545HisArg: 0.545 ± 0.193  | 1.636HisSer: 1.636 ± 0.385  | 0.818HisThr: 0.818 ± 0.252  | 0.818HisVal: 0.818 ± 0.355  | 0.364HisTrp: 0.364 ± 0.164  | 0.454HisTyr: 0.454 ± 0.172  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 5.271IleAla: 5.271 ± 0.861  | 1.091IleCys: 1.091 ± 0.252  | 3.544IleAsp: 3.544 ± 0.496  | 3.726IleGlu: 3.726 ± 0.654  | 2.817IlePhe: 2.817 ± 0.497  | 4.635IleGly: 4.635 ± 0.487  | 1.363IleHis: 1.363 ± 0.336  | 5.271IleIle: 5.271 ± 1.004  | 4.181IleLys: 4.181 ± 0.612  | 6.907IleLeu: 6.907 ± 0.942  | 1.636IleMet: 1.636 ± 0.354  | 2.636IleAsn: 2.636 ± 0.487  | 3.999IlePro: 3.999 ± 0.541  | 2.999IleGln: 2.999 ± 0.471  | 3.272IleArg: 3.272 ± 0.561  | 5.635IleSer: 5.635 ± 0.938  | 4.817IleThr: 4.817 ± 0.446  | 3.544IleVal: 3.544 ± 0.682  | 0.727IleTrp: 0.727 ± 0.23  | 2.363IleTyr: 2.363 ± 0.37  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 5.635LysAla: 5.635 ± 0.939  | 0.364LysCys: 0.364 ± 0.297  | 4.362LysAsp: 4.362 ± 0.725  | 5.362LysGlu: 5.362 ± 0.79  | 2.09LysPhe: 2.09 ± 0.347  | 3.635LysGly: 3.635 ± 0.51  | 1.091LysHis: 1.091 ± 0.277  | 4.272LysIle: 4.272 ± 0.604  | 5.453LysLys: 5.453 ± 0.909  | 5.635LysLeu: 5.635 ± 0.628  | 1.909LysMet: 1.909 ± 0.412  | 2.454LysAsn: 2.454 ± 0.462  | 2.908LysPro: 2.908 ± 0.715  | 2.363LysGln: 2.363 ± 0.513  | 2.636LysArg: 2.636 ± 0.625  | 4.544LysSer: 4.544 ± 0.566  | 4.635LysThr: 4.635 ± 0.74  | 3.999LysVal: 3.999 ± 0.808  | 0.454LysTrp: 0.454 ± 0.225  | 1.909LysTyr: 1.909 ± 0.402  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 8.452LeuAla: 8.452 ± 0.83  | 0.909LeuCys: 0.909 ± 0.305  | 5.907LeuAsp: 5.907 ± 0.979  | 5.635LeuGlu: 5.635 ± 0.801  | 3.817LeuPhe: 3.817 ± 0.54  | 4.908LeuGly: 4.908 ± 0.647  | 2.181LeuHis: 2.181 ± 0.351  | 4.544LeuIle: 4.544 ± 0.519  | 6.453LeuLys: 6.453 ± 1.095  | 7.271LeuLeu: 7.271 ± 1.021  | 2.454LeuMet: 2.454 ± 0.533  | 3.908LeuAsn: 3.908 ± 0.485  | 4.272LeuPro: 4.272 ± 0.6  | 2.908LeuGln: 2.908 ± 0.449  | 4.272LeuArg: 4.272 ± 0.6  | 7.271LeuSer: 7.271 ± 0.854  | 5.998LeuThr: 5.998 ± 0.861  | 5.09LeuVal: 5.09 ± 0.751  | 1.091LeuTrp: 1.091 ± 0.279  | 2.545LeuTyr: 2.545 ± 0.289  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 2.908MetAla: 2.908 ± 0.667  | 0.091MetCys: 0.091 ± 0.094  | 1.999MetAsp: 1.999 ± 0.373  | 3.181MetGlu: 3.181 ± 0.496  | 0.636MetPhe: 0.636 ± 0.192  | 1.545MetGly: 1.545 ± 0.344  | 0.909MetHis: 0.909 ± 0.223  | 1.454MetIle: 1.454 ± 0.329  | 2.181MetLys: 2.181 ± 0.47  | 1.999MetLeu: 1.999 ± 0.344  | 0.545MetMet: 0.545 ± 0.192  | 1.818MetAsn: 1.818 ± 0.395  | 1.091MetPro: 1.091 ± 0.332  | 1.272MetGln: 1.272 ± 0.556  | 1.636MetArg: 1.636 ± 0.507  | 1.181MetSer: 1.181 ± 0.292  | 1.727MetThr: 1.727 ± 0.352  | 0.909MetVal: 0.909 ± 0.21  | 0.182MetTrp: 0.182 ± 0.143  | 0.818MetTyr: 0.818 ± 0.297  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 3.908AsnAla: 3.908 ± 0.467  | 0.182AsnCys: 0.182 ± 0.118  | 1.363AsnAsp: 1.363 ± 0.352  | 2.636AsnGlu: 2.636 ± 0.504  | 1.999AsnPhe: 1.999 ± 0.47  | 3.544AsnGly: 3.544 ± 0.676  | 0.636AsnHis: 0.636 ± 0.219  | 3.544AsnIle: 3.544 ± 0.609  | 2.363AsnLys: 2.363 ± 0.378  | 3.817AsnLeu: 3.817 ± 0.559  | 0.727AsnMet: 0.727 ± 0.213  | 1.999AsnAsn: 1.999 ± 0.549  | 3.908AsnPro: 3.908 ± 0.532  | 0.636AsnGln: 0.636 ± 0.205  | 2.545AsnArg: 2.545 ± 0.542  | 4.272AsnSer: 4.272 ± 0.496  | 3.09AsnThr: 3.09 ± 0.48  | 2.727AsnVal: 2.727 ± 0.442  | 0.636AsnTrp: 0.636 ± 0.249  | 1.727AsnTyr: 1.727 ± 0.362  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 3.09ProAla: 3.09 ± 0.638  | 0.273ProCys: 0.273 ± 0.194  | 3.454ProAsp: 3.454 ± 0.389  | 3.817ProGlu: 3.817 ± 0.511  | 2.727ProPhe: 2.727 ± 0.449  | 3.454ProGly: 3.454 ± 0.648  | 1.0ProHis: 1.0 ± 0.25  | 3.454ProIle: 3.454 ± 0.587  | 2.636ProLys: 2.636 ± 0.496  | 3.09ProLeu: 3.09 ± 0.455  | 0.818ProMet: 0.818 ± 0.284  | 2.181ProAsn: 2.181 ± 0.386  | 1.636ProPro: 1.636 ± 0.497  | 2.09ProGln: 2.09 ± 0.476  | 2.09ProArg: 2.09 ± 0.447  | 2.636ProSer: 2.636 ± 0.368  | 2.454ProThr: 2.454 ± 0.393  | 2.817ProVal: 2.817 ± 0.454  | 0.273ProTrp: 0.273 ± 0.161  | 1.545ProTyr: 1.545 ± 0.326  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 3.817GlnAla: 3.817 ± 0.58  | 0.182GlnCys: 0.182 ± 0.134  | 1.545GlnAsp: 1.545 ± 0.337  | 2.999GlnGlu: 2.999 ± 0.631  | 1.727GlnPhe: 1.727 ± 0.321  | 1.727GlnGly: 1.727 ± 0.377  | 0.818GlnHis: 0.818 ± 0.23  | 2.454GlnIle: 2.454 ± 0.373  | 2.181GlnLys: 2.181 ± 0.712  | 3.908GlnLeu: 3.908 ± 0.565  | 0.636GlnMet: 0.636 ± 0.282  | 1.272GlnAsn: 1.272 ± 0.35  | 1.0GlnPro: 1.0 ± 0.248  | 1.999GlnGln: 1.999 ± 0.531  | 1.818GlnArg: 1.818 ± 0.401  | 2.636GlnSer: 2.636 ± 0.466  | 2.181GlnThr: 2.181 ± 0.458  | 1.454GlnVal: 1.454 ± 0.599  | 0.182GlnTrp: 0.182 ± 0.159  | 1.909GlnTyr: 1.909 ± 0.349  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 3.635ArgAla: 3.635 ± 0.627  | 0.454ArgCys: 0.454 ± 0.235  | 2.545ArgAsp: 2.545 ± 0.622  | 3.09ArgGlu: 3.09 ± 0.502  | 2.545ArgPhe: 2.545 ± 0.465  | 3.454ArgGly: 3.454 ± 0.812  | 0.727ArgHis: 0.727 ± 0.251  | 3.908ArgIle: 3.908 ± 0.725  | 3.635ArgLys: 3.635 ± 0.889  | 3.726ArgLeu: 3.726 ± 0.451  | 1.181ArgMet: 1.181 ± 0.235  | 2.363ArgAsn: 2.363 ± 0.425  | 1.545ArgPro: 1.545 ± 0.447  | 1.999ArgGln: 1.999 ± 0.445  | 2.363ArgArg: 2.363 ± 0.553  | 2.09ArgSer: 2.09 ± 0.55  | 3.181ArgThr: 3.181 ± 0.372  | 2.999ArgVal: 2.999 ± 0.674  | 0.091ArgTrp: 0.091 ± 0.113  | 1.181ArgTyr: 1.181 ± 0.297  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 4.817SerAla: 4.817 ± 0.678  | 0.364SerCys: 0.364 ± 0.187  | 2.999SerAsp: 2.999 ± 0.373  | 3.363SerGlu: 3.363 ± 0.643  | 2.999SerPhe: 2.999 ± 0.542  | 3.999SerGly: 3.999 ± 0.771  | 1.0SerHis: 1.0 ± 0.281  | 5.726SerIle: 5.726 ± 0.754  | 3.454SerLys: 3.454 ± 0.437  | 6.271SerLeu: 6.271 ± 0.708  | 2.363SerMet: 2.363 ± 0.407  | 2.908SerAsn: 2.908 ± 0.534  | 3.272SerPro: 3.272 ± 0.837  | 2.181SerGln: 2.181 ± 0.382  | 3.181SerArg: 3.181 ± 0.539  | 4.453SerSer: 4.453 ± 0.853  | 3.908SerThr: 3.908 ± 0.566  | 4.272SerVal: 4.272 ± 0.584  | 0.454SerTrp: 0.454 ± 0.208  | 2.181SerTyr: 2.181 ± 0.406  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 5.453ThrAla: 5.453 ± 0.768  | 0.364ThrCys: 0.364 ± 0.208  | 3.908ThrAsp: 3.908 ± 0.612  | 4.453ThrGlu: 4.453 ± 0.605  | 2.727ThrPhe: 2.727 ± 0.475  | 4.544ThrGly: 4.544 ± 0.577  | 1.091ThrHis: 1.091 ± 0.266  | 4.999ThrIle: 4.999 ± 0.778  | 4.09ThrLys: 4.09 ± 0.716  | 6.18ThrLeu: 6.18 ± 0.752  | 2.09ThrMet: 2.09 ± 0.404  | 2.545ThrAsn: 2.545 ± 0.452  | 3.726ThrPro: 3.726 ± 0.736  | 1.545ThrGln: 1.545 ± 0.344  | 2.272ThrArg: 2.272 ± 0.406  | 3.817ThrSer: 3.817 ± 0.738  | 4.908ThrThr: 4.908 ± 1.047  | 4.362ThrVal: 4.362 ± 0.701  | 0.545ThrTrp: 0.545 ± 0.188  | 1.727ThrTyr: 1.727 ± 0.308  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 4.362ValAla: 4.362 ± 0.576  | 0.273ValCys: 0.273 ± 0.193  | 3.544ValAsp: 3.544 ± 0.511  | 3.817ValGlu: 3.817 ± 0.559  | 2.181ValPhe: 2.181 ± 0.505  | 2.999ValGly: 2.999 ± 0.649  | 1.272ValHis: 1.272 ± 0.377  | 3.544ValIle: 3.544 ± 0.505  | 3.817ValLys: 3.817 ± 0.556  | 5.362ValLeu: 5.362 ± 0.777  | 1.545ValMet: 1.545 ± 0.409  | 2.545ValAsn: 2.545 ± 0.383  | 2.908ValPro: 2.908 ± 0.434  | 1.909ValGln: 1.909 ± 0.483  | 2.09ValArg: 2.09 ± 0.323  | 4.453ValSer: 4.453 ± 0.502  | 4.09ValThr: 4.09 ± 0.794  | 3.363ValVal: 3.363 ± 0.666  | 0.636ValTrp: 0.636 ± 0.289  | 2.636ValTyr: 2.636 ± 0.509  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.545TrpAla: 0.545 ± 0.231  | 0.182TrpCys: 0.182 ± 0.126  | 0.727TrpAsp: 0.727 ± 0.275  | 1.181TrpGlu: 1.181 ± 0.272  | 0.545TrpPhe: 0.545 ± 0.207  | 0.273TrpGly: 0.273 ± 0.125  | 0.454TrpHis: 0.454 ± 0.166  | 0.273TrpIle: 0.273 ± 0.176  | 0.636TrpLys: 0.636 ± 0.194  | 1.091TrpLeu: 1.091 ± 0.272  | 0.273TrpMet: 0.273 ± 0.164  | 0.818TrpAsn: 0.818 ± 0.304  | 0.364TrpPro: 0.364 ± 0.167  | 0.545TrpGln: 0.545 ± 0.214  | 0.818TrpArg: 0.818 ± 0.215  | 0.182TrpSer: 0.182 ± 0.141  | 0.454TrpThr: 0.454 ± 0.179  | 0.636TrpVal: 0.636 ± 0.252  | 0.364TrpTrp: 0.364 ± 0.163  | 0.182TrpTyr: 0.182 ± 0.103  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 2.727TyrAla: 2.727 ± 0.54  | 0.182TyrCys: 0.182 ± 0.135  | 2.272TyrAsp: 2.272 ± 0.429  | 1.363TyrGlu: 1.363 ± 0.295  | 1.454TyrPhe: 1.454 ± 0.444  | 2.545TyrGly: 2.545 ± 0.488  | 0.545TyrHis: 0.545 ± 0.217  | 1.909TyrIle: 1.909 ± 0.495  | 2.09TyrLys: 2.09 ± 0.381  | 3.544TyrLeu: 3.544 ± 0.586  | 1.0TyrMet: 1.0 ± 0.333  | 1.363TyrAsn: 1.363 ± 0.339  | 1.454TyrPro: 1.454 ± 0.399  | 1.454TyrGln: 1.454 ± 0.364  | 2.272TyrArg: 2.272 ± 0.51  | 1.727TyrSer: 1.727 ± 0.416  | 1.818TyrThr: 1.818 ± 0.404  | 2.454TyrVal: 2.454 ± 0.538  | 0.454TyrTrp: 0.454 ± 0.202  | 1.0TyrTyr: 1.0 ± 0.343  | 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 |