
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 | 0.942AlaAla: 0.942 ± 0.625  | 0.471AlaCys: 0.471 ± 0.476  | 2.355AlaAsp: 2.355 ± 0.756  | 0.942AlaGlu: 0.942 ± 0.458  | 2.355AlaPhe: 2.355 ± 0.923  | 5.181AlaGly: 5.181 ± 1.065  | 1.413AlaHis: 1.413 ± 0.578  | 2.355AlaIle: 2.355 ± 0.9  | 3.768AlaLys: 3.768 ± 1.208  | 3.297AlaLeu: 3.297 ± 1.212  | 2.355AlaMet: 2.355 ± 0.806  | 2.826AlaAsn: 2.826 ± 0.941  | 2.355AlaPro: 2.355 ± 1.04  | 0.942AlaGln: 0.942 ± 0.458  | 2.355AlaArg: 2.355 ± 0.98  | 3.768AlaSer: 3.768 ± 1.156  | 1.413AlaThr: 1.413 ± 0.883  | 3.768AlaVal: 3.768 ± 1.186  | 1.413AlaTrp: 1.413 ± 0.622  | 1.413AlaTyr: 1.413 ± 0.751  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.0CysAla: 0.0 ± 0.0  | 0.942CysCys: 0.942 ± 0.6  | 1.413CysAsp: 1.413 ± 1.425  | 0.0CysGlu: 0.0 ± 0.0  | 1.413CysPhe: 1.413 ± 0.578  | 0.471CysGly: 0.471 ± 0.409  | 1.413CysHis: 1.413 ± 1.062  | 2.355CysIle: 2.355 ± 0.818  | 1.413CysLys: 1.413 ± 1.06  | 1.413CysLeu: 1.413 ± 0.689  | 1.413CysMet: 1.413 ± 0.527  | 2.355CysAsn: 2.355 ± 0.629  | 0.0CysPro: 0.0 ± 0.0  | 1.413CysGln: 1.413 ± 0.728  | 2.355CysArg: 2.355 ± 1.187  | 1.884CysSer: 1.884 ± 0.968  | 4.239CysThr: 4.239 ± 1.358  | 0.471CysVal: 0.471 ± 0.409  | 0.471CysTrp: 0.471 ± 0.427  | 0.471CysTyr: 0.471 ± 0.476  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 0.942AspAla: 0.942 ± 0.854  | 0.942AspCys: 0.942 ± 0.717  | 5.181AspAsp: 5.181 ± 1.739  | 6.123AspGlu: 6.123 ± 0.9  | 1.413AspPhe: 1.413 ± 0.6  | 2.826AspGly: 2.826 ± 0.859  | 1.884AspHis: 1.884 ± 0.609  | 4.71AspIle: 4.71 ± 1.094  | 1.884AspLys: 1.884 ± 0.935  | 3.297AspLeu: 3.297 ± 1.254  | 2.826AspMet: 2.826 ± 0.698  | 0.0AspAsn: 0.0 ± 0.0  | 4.71AspPro: 4.71 ± 1.408  | 0.0AspGln: 0.0 ± 0.0  | 3.297AspArg: 3.297 ± 1.007  | 4.71AspSer: 4.71 ± 1.81  | 1.413AspThr: 1.413 ± 0.814  | 6.594AspVal: 6.594 ± 2.477  | 0.471AspTrp: 0.471 ± 0.475  | 3.768AspTyr: 3.768 ± 1.179  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 4.239GluAla: 4.239 ± 1.654  | 1.413GluCys: 1.413 ± 0.746  | 7.537GluAsp: 7.537 ± 1.713  | 10.363GluGlu: 10.363 ± 2.945  | 1.884GluPhe: 1.884 ± 1.007  | 4.71GluGly: 4.71 ± 0.995  | 0.471GluHis: 0.471 ± 0.454  | 2.355GluIle: 2.355 ± 0.966  | 2.355GluLys: 2.355 ± 1.12  | 8.479GluLeu: 8.479 ± 1.378  | 3.297GluMet: 3.297 ± 1.235  | 0.942GluAsn: 0.942 ± 0.588  | 2.826GluPro: 2.826 ± 1.195  | 3.297GluGln: 3.297 ± 1.026  | 6.123GluArg: 6.123 ± 1.117  | 3.768GluSer: 3.768 ± 1.152  | 1.413GluThr: 1.413 ± 0.782  | 3.297GluVal: 3.297 ± 1.498  | 0.0GluTrp: 0.0 ± 0.0  | 4.71GluTyr: 4.71 ± 1.465  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 4.239PheAla: 4.239 ± 1.364  | 0.942PheCys: 0.942 ± 0.633  | 1.884PheAsp: 1.884 ± 0.555  | 2.355PheGlu: 2.355 ± 0.952  | 0.471PhePhe: 0.471 ± 0.506  | 1.884PheGly: 1.884 ± 1.029  | 0.0PheHis: 0.0 ± 0.0  | 1.884PheIle: 1.884 ± 0.752  | 0.471PheLys: 0.471 ± 0.578  | 4.239PheLeu: 4.239 ± 1.667  | 0.942PheMet: 0.942 ± 0.548  | 2.355PheAsn: 2.355 ± 1.525  | 1.413PhePro: 1.413 ± 0.687  | 1.413PheGln: 1.413 ± 0.555  | 1.413PheArg: 1.413 ± 0.741  | 2.826PheSer: 2.826 ± 0.592  | 2.826PheThr: 2.826 ± 0.879  | 1.413PheVal: 1.413 ± 0.637  | 0.942PheTrp: 0.942 ± 0.769  | 1.884PheTyr: 1.884 ± 0.752  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 2.355GlyAla: 2.355 ± 0.717  | 0.942GlyCys: 0.942 ± 0.605  | 1.884GlyAsp: 1.884 ± 0.956  | 4.71GlyGlu: 4.71 ± 1.65  | 1.413GlyPhe: 1.413 ± 0.745  | 5.652GlyGly: 5.652 ± 1.413  | 0.942GlyHis: 0.942 ± 0.853  | 2.355GlyIle: 2.355 ± 0.874  | 5.652GlyLys: 5.652 ± 1.741  | 4.239GlyLeu: 4.239 ± 1.226  | 1.413GlyMet: 1.413 ± 0.862  | 3.297GlyAsn: 3.297 ± 1.299  | 3.768GlyPro: 3.768 ± 1.395  | 0.471GlyGln: 0.471 ± 0.475  | 2.355GlyArg: 2.355 ± 1.164  | 3.768GlySer: 3.768 ± 1.054  | 2.355GlyThr: 2.355 ± 1.415  | 2.355GlyVal: 2.355 ± 0.787  | 0.942GlyTrp: 0.942 ± 0.554  | 4.71GlyTyr: 4.71 ± 1.672  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 0.0HisAla: 0.0 ± 0.0  | 0.0HisCys: 0.0 ± 0.0  | 2.355HisAsp: 2.355 ± 0.694  | 1.884HisGlu: 1.884 ± 0.822  | 0.942HisPhe: 0.942 ± 0.854  | 0.942HisGly: 0.942 ± 0.633  | 0.0HisHis: 0.0 ± 0.0  | 0.471HisIle: 0.471 ± 0.376  | 1.413HisLys: 1.413 ± 0.67  | 5.181HisLeu: 5.181 ± 1.139  | 0.0HisMet: 0.0 ± 0.0  | 1.413HisAsn: 1.413 ± 0.726  | 0.0HisPro: 0.0 ± 0.0  | 1.413HisGln: 1.413 ± 0.685  | 0.942HisArg: 0.942 ± 0.599  | 0.471HisSer: 0.471 ± 0.475  | 0.471HisThr: 0.471 ± 0.506  | 2.826HisVal: 2.826 ± 1.26  | 0.942HisTrp: 0.942 ± 0.554  | 0.0HisTyr: 0.0 ± 0.0  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 2.826IleAla: 2.826 ± 0.894  | 2.355IleCys: 2.355 ± 1.535  | 0.942IleAsp: 0.942 ± 0.641  | 5.181IleGlu: 5.181 ± 2.059  | 0.471IlePhe: 0.471 ± 0.376  | 3.297IleGly: 3.297 ± 1.362  | 0.942IleHis: 0.942 ± 0.561  | 6.594IleIle: 6.594 ± 1.698  | 6.594IleLys: 6.594 ± 1.247  | 0.942IleLeu: 0.942 ± 0.642  | 1.884IleMet: 1.884 ± 0.713  | 4.71IleAsn: 4.71 ± 2.137  | 2.355IlePro: 2.355 ± 0.928  | 1.884IleGln: 1.884 ± 0.867  | 4.71IleArg: 4.71 ± 1.478  | 6.123IleSer: 6.123 ± 1.241  | 2.826IleThr: 2.826 ± 1.235  | 5.652IleVal: 5.652 ± 1.128  | 2.355IleTrp: 2.355 ± 0.843  | 0.471IleTyr: 0.471 ± 0.376  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 4.239LysAla: 4.239 ± 1.233  | 0.471LysCys: 0.471 ± 0.454  | 4.239LysAsp: 4.239 ± 1.219  | 5.181LysGlu: 5.181 ± 1.342  | 2.355LysPhe: 2.355 ± 1.035  | 2.826LysGly: 2.826 ± 1.195  | 1.413LysHis: 1.413 ± 0.578  | 4.71LysIle: 4.71 ± 1.349  | 10.834LysLys: 10.834 ± 1.964  | 6.123LysLeu: 6.123 ± 1.462  | 3.297LysMet: 3.297 ± 0.879  | 3.768LysAsn: 3.768 ± 1.065  | 0.942LysPro: 0.942 ± 0.617  | 0.0LysGln: 0.0 ± 0.0  | 4.71LysArg: 4.71 ± 1.273  | 4.71LysSer: 4.71 ± 1.009  | 5.181LysThr: 5.181 ± 1.045  | 4.71LysVal: 4.71 ± 1.975  | 1.413LysTrp: 1.413 ± 0.727  | 5.181LysTyr: 5.181 ± 1.139  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 2.826LeuAla: 2.826 ± 1.003  | 0.942LeuCys: 0.942 ± 0.619  | 3.768LeuAsp: 3.768 ± 1.619  | 4.71LeuGlu: 4.71 ± 1.14  | 1.884LeuPhe: 1.884 ± 0.607  | 3.768LeuGly: 3.768 ± 1.027  | 0.942LeuHis: 0.942 ± 0.486  | 5.181LeuIle: 5.181 ± 1.355  | 12.718LeuLys: 12.718 ± 1.241  | 9.421LeuLeu: 9.421 ± 3.075  | 1.884LeuMet: 1.884 ± 0.619  | 4.71LeuAsn: 4.71 ± 1.108  | 2.826LeuPro: 2.826 ± 1.145  | 5.181LeuGln: 5.181 ± 1.196  | 6.123LeuArg: 6.123 ± 1.665  | 3.297LeuSer: 3.297 ± 1.102  | 1.884LeuThr: 1.884 ± 0.987  | 5.652LeuVal: 5.652 ± 1.9  | 0.471LeuTrp: 0.471 ± 0.476  | 7.065LeuTyr: 7.065 ± 1.597  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 4.239MetAla: 4.239 ± 0.964  | 0.471MetCys: 0.471 ± 0.475  | 2.355MetAsp: 2.355 ± 0.793  | 2.826MetGlu: 2.826 ± 0.821  | 1.413MetPhe: 1.413 ± 0.741  | 0.942MetGly: 0.942 ± 0.646  | 0.0MetHis: 0.0 ± 0.0  | 2.355MetIle: 2.355 ± 0.854  | 6.594MetLys: 6.594 ± 2.116  | 2.826MetLeu: 2.826 ± 0.801  | 0.471MetMet: 0.471 ± 0.409  | 1.884MetAsn: 1.884 ± 0.555  | 0.942MetPro: 0.942 ± 0.633  | 0.942MetGln: 0.942 ± 0.618  | 0.471MetArg: 0.471 ± 0.578  | 0.942MetSer: 0.942 ± 0.605  | 0.471MetThr: 0.471 ± 0.376  | 0.942MetVal: 0.942 ± 0.667  | 0.0MetTrp: 0.0 ± 0.0  | 0.942MetTyr: 0.942 ± 0.572  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 0.471AsnAla: 0.471 ± 0.409  | 1.884AsnCys: 1.884 ± 0.887  | 1.884AsnAsp: 1.884 ± 0.804  | 1.884AsnGlu: 1.884 ± 0.971  | 2.355AsnPhe: 2.355 ± 1.284  | 2.355AsnGly: 2.355 ± 1.063  | 0.942AsnHis: 0.942 ± 0.665  | 3.297AsnIle: 3.297 ± 1.056  | 2.355AsnLys: 2.355 ± 0.81  | 0.471AsnLeu: 0.471 ± 0.475  | 0.471AsnMet: 0.471 ± 0.485  | 1.884AsnAsn: 1.884 ± 0.677  | 2.826AsnPro: 2.826 ± 1.249  | 1.884AsnGln: 1.884 ± 1.029  | 3.297AsnArg: 3.297 ± 1.107  | 1.884AsnSer: 1.884 ± 0.767  | 3.768AsnThr: 3.768 ± 1.077  | 3.297AsnVal: 3.297 ± 1.148  | 1.884AsnTrp: 1.884 ± 0.635  | 4.71AsnTyr: 4.71 ± 1.068  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 1.413ProAla: 1.413 ± 0.804  | 0.471ProCys: 0.471 ± 0.427  | 2.826ProAsp: 2.826 ± 1.305  | 4.239ProGlu: 4.239 ± 1.168  | 0.942ProPhe: 0.942 ± 0.741  | 2.826ProGly: 2.826 ± 0.861  | 0.942ProHis: 0.942 ± 0.513  | 1.884ProIle: 1.884 ± 1.042  | 0.942ProLys: 0.942 ± 0.513  | 2.355ProLeu: 2.355 ± 1.043  | 0.0ProMet: 0.0 ± 0.0  | 1.884ProAsn: 1.884 ± 0.959  | 0.471ProPro: 0.471 ± 0.437  | 1.413ProGln: 1.413 ± 0.687  | 3.297ProArg: 3.297 ± 1.23  | 3.297ProSer: 3.297 ± 1.493  | 2.826ProThr: 2.826 ± 0.968  | 2.355ProVal: 2.355 ± 0.977  | 2.826ProTrp: 2.826 ± 1.027  | 1.413ProTyr: 1.413 ± 0.937  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 0.942GlnAla: 0.942 ± 0.642  | 0.471GlnCys: 0.471 ± 0.475  | 5.181GlnAsp: 5.181 ± 1.451  | 2.826GlnGlu: 2.826 ± 0.938  | 2.355GlnPhe: 2.355 ± 1.251  | 3.297GlnGly: 3.297 ± 1.598  | 2.355GlnHis: 2.355 ± 0.719  | 0.942GlnIle: 0.942 ± 0.618  | 3.297GlnLys: 3.297 ± 0.87  | 2.355GlnLeu: 2.355 ± 0.684  | 0.942GlnMet: 0.942 ± 0.853  | 0.471GlnAsn: 0.471 ± 0.409  | 0.471GlnPro: 0.471 ± 0.476  | 1.413GlnGln: 1.413 ± 0.858  | 0.942GlnArg: 0.942 ± 0.486  | 2.826GlnSer: 2.826 ± 0.953  | 1.413GlnThr: 1.413 ± 0.678  | 1.884GlnVal: 1.884 ± 0.82  | 0.0GlnTrp: 0.0 ± 0.0  | 1.413GlnTyr: 1.413 ± 0.665  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 2.355ArgAla: 2.355 ± 0.665  | 2.826ArgCys: 2.826 ± 0.972  | 3.297ArgAsp: 3.297 ± 1.249  | 4.239ArgGlu: 4.239 ± 1.074  | 2.826ArgPhe: 2.826 ± 1.513  | 1.413ArgGly: 1.413 ± 0.927  | 1.413ArgHis: 1.413 ± 0.87  | 4.71ArgIle: 4.71 ± 1.011  | 5.652ArgLys: 5.652 ± 1.31  | 2.826ArgLeu: 2.826 ± 0.909  | 1.884ArgMet: 1.884 ± 1.496  | 2.826ArgAsn: 2.826 ± 1.371  | 3.768ArgPro: 3.768 ± 1.145  | 1.413ArgGln: 1.413 ± 0.703  | 7.065ArgArg: 7.065 ± 2.93  | 1.413ArgSer: 1.413 ± 0.878  | 3.297ArgThr: 3.297 ± 0.587  | 6.123ArgVal: 6.123 ± 1.335  | 0.942ArgTrp: 0.942 ± 0.707  | 1.884ArgTyr: 1.884 ± 1.77  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 4.239SerAla: 4.239 ± 1.398  | 2.826SerCys: 2.826 ± 1.039  | 2.355SerAsp: 2.355 ± 1.049  | 4.71SerGlu: 4.71 ± 1.438  | 3.768SerPhe: 3.768 ± 1.097  | 2.355SerGly: 2.355 ± 1.175  | 1.413SerHis: 1.413 ± 0.572  | 2.826SerIle: 2.826 ± 1.269  | 1.884SerLys: 1.884 ± 0.781  | 7.065SerLeu: 7.065 ± 1.872  | 3.297SerMet: 3.297 ± 1.259  | 2.355SerAsn: 2.355 ± 1.085  | 3.297SerPro: 3.297 ± 1.018  | 2.826SerGln: 2.826 ± 1.248  | 2.826SerArg: 2.826 ± 0.895  | 4.71SerSer: 4.71 ± 1.256  | 2.826SerThr: 2.826 ± 1.247  | 3.297SerVal: 3.297 ± 1.211  | 1.884SerTrp: 1.884 ± 0.746  | 2.826SerTyr: 2.826 ± 1.274  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 3.297ThrAla: 3.297 ± 1.645  | 1.413ThrCys: 1.413 ± 0.697  | 1.413ThrAsp: 1.413 ± 0.682  | 2.355ThrGlu: 2.355 ± 0.873  | 0.942ThrPhe: 0.942 ± 0.583  | 2.355ThrGly: 2.355 ± 1.488  | 0.942ThrHis: 0.942 ± 0.618  | 3.768ThrIle: 3.768 ± 1.181  | 2.826ThrLys: 2.826 ± 1.481  | 7.065ThrLeu: 7.065 ± 1.37  | 0.0ThrMet: 0.0 ± 0.0  | 0.471ThrAsn: 0.471 ± 0.409  | 1.884ThrPro: 1.884 ± 0.8  | 2.826ThrGln: 2.826 ± 0.959  | 4.239ThrArg: 4.239 ± 1.173  | 2.355ThrSer: 2.355 ± 1.227  | 1.413ThrThr: 1.413 ± 0.747  | 2.826ThrVal: 2.826 ± 1.615  | 0.942ThrTrp: 0.942 ± 0.853  | 1.413ThrTyr: 1.413 ± 0.634  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 2.355ValAla: 2.355 ± 1.375  | 2.826ValCys: 2.826 ± 1.296  | 4.239ValAsp: 4.239 ± 1.944  | 3.768ValGlu: 3.768 ± 1.211  | 4.239ValPhe: 4.239 ± 1.06  | 1.884ValGly: 1.884 ± 0.657  | 2.355ValHis: 2.355 ± 0.778  | 7.065ValIle: 7.065 ± 1.586  | 2.826ValLys: 2.826 ± 0.959  | 7.065ValLeu: 7.065 ± 1.644  | 2.826ValMet: 2.826 ± 1.058  | 4.239ValAsn: 4.239 ± 1.294  | 3.297ValPro: 3.297 ± 0.784  | 1.413ValGln: 1.413 ± 0.866  | 2.355ValArg: 2.355 ± 0.947  | 4.239ValSer: 4.239 ± 1.783  | 1.413ValThr: 1.413 ± 0.883  | 4.239ValVal: 4.239 ± 1.827  | 0.471ValTrp: 0.471 ± 0.376  | 5.652ValTyr: 5.652 ± 1.498  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.0TrpAla: 0.0 ± 0.0  | 1.413TrpCys: 1.413 ± 0.578  | 0.471TrpAsp: 0.471 ± 0.427  | 2.355TrpGlu: 2.355 ± 0.837  | 0.942TrpPhe: 0.942 ± 0.583  | 0.0TrpGly: 0.0 ± 0.0  | 0.0TrpHis: 0.0 ± 0.0  | 0.942TrpIle: 0.942 ± 0.632  | 0.471TrpLys: 0.471 ± 0.578  | 1.413TrpLeu: 1.413 ± 0.848  | 0.471TrpMet: 0.471 ± 0.427  | 0.942TrpAsn: 0.942 ± 0.58  | 0.0TrpPro: 0.0 ± 0.0  | 2.826TrpGln: 2.826 ± 1.044  | 0.471TrpArg: 0.471 ± 0.437  | 1.884TrpSer: 1.884 ± 1.101  | 0.471TrpThr: 0.471 ± 0.427  | 2.826TrpVal: 2.826 ± 0.71  | 0.471TrpTrp: 0.471 ± 0.427  | 0.471TrpTyr: 0.471 ± 0.427  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 3.768TyrAla: 3.768 ± 1.031  | 1.884TyrCys: 1.884 ± 0.806  | 1.413TyrAsp: 1.413 ± 1.189  | 2.826TyrGlu: 2.826 ± 0.917  | 1.413TyrPhe: 1.413 ± 0.696  | 6.594TyrGly: 6.594 ± 1.187  | 1.884TyrHis: 1.884 ± 1.18  | 2.355TyrIle: 2.355 ± 1.041  | 2.355TyrLys: 2.355 ± 1.08  | 5.181TyrLeu: 5.181 ± 1.078  | 1.884TyrMet: 1.884 ± 0.847  | 0.471TyrAsn: 0.471 ± 0.475  | 0.471TyrPro: 0.471 ± 0.578  | 2.826TyrGln: 2.826 ± 0.935  | 2.826TyrArg: 2.826 ± 0.909  | 4.71TyrSer: 4.71 ± 1.798  | 2.826TyrThr: 2.826 ± 1.006  | 4.71TyrVal: 4.71 ± 1.428  | 0.0TyrTrp: 0.0 ± 0.0  | 1.413TyrTyr: 1.413 ± 0.813  | 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 |