
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 | 4.481AlaAla: 4.481 ± 1.337  | 1.494AlaCys: 1.494 ± 1.718  | 0.747AlaAsp: 0.747 ± 0.417  | 2.24AlaGlu: 2.24 ± 0.934  | 3.734AlaPhe: 3.734 ± 0.742  | 2.24AlaGly: 2.24 ± 1.251  | 0.0AlaHis: 0.0 ± 0.0  | 1.494AlaIle: 1.494 ± 1.56  | 3.734AlaLys: 3.734 ± 1.715  | 5.975AlaLeu: 5.975 ± 1.219  | 2.24AlaMet: 2.24 ± 0.924  | 4.481AlaAsn: 4.481 ± 0.956  | 3.734AlaPro: 3.734 ± 1.076  | 1.494AlaGln: 1.494 ± 1.238  | 8.215AlaArg: 8.215 ± 2.975  | 4.481AlaSer: 4.481 ± 1.505  | 4.481AlaThr: 4.481 ± 1.768  | 8.962AlaVal: 8.962 ± 3.453  | 1.494AlaTrp: 1.494 ± 0.834  | 0.0AlaTyr: 0.0 ± 0.0  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.747CysAla: 0.747 ± 0.417  | 0.0CysCys: 0.0 ± 0.0  | 0.0CysAsp: 0.0 ± 0.0  | 0.0CysGlu: 0.0 ± 0.0  | 3.734CysPhe: 3.734 ± 2.431  | 0.0CysGly: 0.0 ± 0.0  | 2.987CysHis: 2.987 ± 1.656  | 1.494CysIle: 1.494 ± 0.828  | 0.747CysLys: 0.747 ± 0.78  | 0.0CysLeu: 0.0 ± 0.0  | 0.747CysMet: 0.747 ± 0.417  | 2.24CysAsn: 2.24 ± 0.78  | 0.747CysPro: 0.747 ± 0.417  | 0.747CysGln: 0.747 ± 0.417  | 2.24CysArg: 2.24 ± 0.934  | 2.987CysSer: 2.987 ± 1.227  | 0.747CysThr: 0.747 ± 0.417  | 0.0CysVal: 0.0 ± 0.0  | 0.0CysTrp: 0.0 ± 0.0  | 0.747CysTyr: 0.747 ± 1.429  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 2.24AspAla: 2.24 ± 0.726  | 2.24AspCys: 2.24 ± 0.934  | 2.987AspAsp: 2.987 ± 1.161  | 3.734AspGlu: 3.734 ± 1.715  | 2.24AspPhe: 2.24 ± 1.358  | 2.987AspGly: 2.987 ± 1.667  | 1.494AspHis: 1.494 ± 1.055  | 1.494AspIle: 1.494 ± 0.828  | 1.494AspLys: 1.494 ± 1.718  | 3.734AspLeu: 3.734 ± 1.513  | 2.987AspMet: 2.987 ± 1.186  | 1.494AspAsn: 1.494 ± 0.628  | 2.987AspPro: 2.987 ± 1.003  | 1.494AspGln: 1.494 ± 0.628  | 0.747AspArg: 0.747 ± 0.78  | 5.228AspSer: 5.228 ± 1.145  | 0.0AspThr: 0.0 ± 0.0  | 2.24AspVal: 2.24 ± 0.934  | 0.0AspTrp: 0.0 ± 0.0  | 1.494AspTyr: 1.494 ± 0.628  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 3.734GluAla: 3.734 ± 1.513  | 0.0GluCys: 0.0 ± 0.0  | 2.987GluAsp: 2.987 ± 1.14  | 5.228GluGlu: 5.228 ± 2.257  | 3.734GluPhe: 3.734 ± 1.69  | 4.481GluGly: 4.481 ± 3.964  | 1.494GluHis: 1.494 ± 0.834  | 0.747GluIle: 0.747 ± 0.417  | 2.987GluLys: 2.987 ± 1.249  | 2.987GluLeu: 2.987 ± 0.637  | 4.481GluMet: 4.481 ± 1.868  | 2.24GluAsn: 2.24 ± 1.358  | 3.734GluPro: 3.734 ± 1.088  | 1.494GluGln: 1.494 ± 0.628  | 3.734GluArg: 3.734 ± 1.447  | 3.734GluSer: 3.734 ± 1.228  | 3.734GluThr: 3.734 ± 0.991  | 0.747GluVal: 0.747 ± 0.417  | 0.0GluTrp: 0.0 ± 0.0  | 0.747GluTyr: 0.747 ± 0.417  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 0.747PheAla: 0.747 ± 0.78  | 1.494PheCys: 1.494 ± 1.238  | 2.24PheAsp: 2.24 ± 1.353  | 0.747PheGlu: 0.747 ± 0.417  | 5.228PhePhe: 5.228 ± 2.172  | 4.481PheGly: 4.481 ± 1.875  | 1.494PheHis: 1.494 ± 0.828  | 5.975PheIle: 5.975 ± 2.38  | 2.987PheLys: 2.987 ± 1.161  | 5.975PheLeu: 5.975 ± 2.323  | 3.734PheMet: 3.734 ± 1.067  | 3.734PheAsn: 3.734 ± 2.449  | 2.987PhePro: 2.987 ± 1.136  | 2.987PheGln: 2.987 ± 1.186  | 1.494PheArg: 1.494 ± 0.834  | 5.975PheSer: 5.975 ± 1.566  | 4.481PheThr: 4.481 ± 1.204  | 8.962PheVal: 8.962 ± 2.31  | 0.747PheTrp: 0.747 ± 0.417  | 1.494PheTyr: 1.494 ± 0.834  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 5.228GlyAla: 5.228 ± 2.069  | 0.747GlyCys: 0.747 ± 0.417  | 4.481GlyAsp: 4.481 ± 2.254  | 2.24GlyGlu: 2.24 ± 1.251  | 5.228GlyPhe: 5.228 ± 2.257  | 4.481GlyGly: 4.481 ± 1.883  | 0.747GlyHis: 0.747 ± 1.429  | 2.987GlyIle: 2.987 ± 1.003  | 2.987GlyLys: 2.987 ± 1.752  | 7.468GlyLeu: 7.468 ± 2.548  | 0.747GlyMet: 0.747 ± 0.417  | 3.734GlyAsn: 3.734 ± 0.742  | 2.987GlyPro: 2.987 ± 1.161  | 1.494GlyGln: 1.494 ± 1.56  | 3.734GlyArg: 3.734 ± 2.084  | 5.228GlySer: 5.228 ± 1.896  | 3.734GlyThr: 3.734 ± 1.096  | 5.228GlyVal: 5.228 ± 1.373  | 0.0GlyTrp: 0.0 ± 0.0  | 0.0GlyTyr: 0.0 ± 0.0  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 2.24HisAla: 2.24 ± 0.78  | 1.494HisCys: 1.494 ± 0.828  | 0.747HisAsp: 0.747 ± 0.417  | 1.494HisGlu: 1.494 ± 1.238  | 0.747HisPhe: 0.747 ± 0.417  | 2.24HisGly: 2.24 ± 0.934  | 0.747HisHis: 0.747 ± 1.125  | 4.481HisIle: 4.481 ± 1.868  | 2.24HisLys: 2.24 ± 1.854  | 0.747HisLeu: 0.747 ± 0.417  | 0.0HisMet: 0.0 ± 0.0  | 1.494HisAsn: 1.494 ± 0.834  | 0.0HisPro: 0.0 ± 0.0  | 1.494HisGln: 1.494 ± 0.834  | 2.987HisArg: 2.987 ± 1.656  | 2.24HisSer: 2.24 ± 0.726  | 3.734HisThr: 3.734 ± 1.406  | 0.0HisVal: 0.0 ± 0.0  | 0.0HisTrp: 0.0 ± 0.0  | 1.494HisTyr: 1.494 ± 0.828  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 7.468IleAla: 7.468 ± 1.745  | 0.747IleCys: 0.747 ± 0.417  | 1.494IleAsp: 1.494 ± 0.628  | 1.494IleGlu: 1.494 ± 1.56  | 2.24IlePhe: 2.24 ± 1.353  | 2.987IleGly: 2.987 ± 2.11  | 0.0IleHis: 0.0 ± 0.0  | 2.987IleIle: 2.987 ± 2.758  | 0.0IleLys: 0.0 ± 0.0  | 2.24IleLeu: 2.24 ± 0.934  | 2.987IleMet: 2.987 ± 1.161  | 3.734IleAsn: 3.734 ± 2.161  | 3.734IlePro: 3.734 ± 2.026  | 1.494IleGln: 1.494 ± 0.628  | 2.987IleArg: 2.987 ± 1.186  | 2.987IleSer: 2.987 ± 1.249  | 2.24IleThr: 2.24 ± 0.934  | 5.228IleVal: 5.228 ± 3.118  | 1.494IleTrp: 1.494 ± 0.628  | 1.494IleTyr: 1.494 ± 1.56  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 1.494LysAla: 1.494 ± 0.834  | 0.0LysCys: 0.0 ± 0.0  | 2.987LysAsp: 2.987 ± 1.186  | 4.481LysGlu: 4.481 ± 2.254  | 0.747LysPhe: 0.747 ± 0.417  | 2.987LysGly: 2.987 ± 1.003  | 2.987LysHis: 2.987 ± 1.186  | 0.747LysIle: 0.747 ± 0.417  | 0.747LysLys: 0.747 ± 0.78  | 4.481LysLeu: 4.481 ± 1.022  | 2.24LysMet: 2.24 ± 1.351  | 0.747LysAsn: 0.747 ± 0.78  | 3.734LysPro: 3.734 ± 1.202  | 0.747LysGln: 0.747 ± 0.417  | 2.987LysArg: 2.987 ± 1.161  | 6.721LysSer: 6.721 ± 1.492  | 4.481LysThr: 4.481 ± 1.651  | 4.481LysVal: 4.481 ± 0.805  | 0.0LysTrp: 0.0 ± 0.0  | 2.987LysTyr: 2.987 ± 2.118  | 0.747LysXaa: 0.747 ± 0.417  | 
| Leu | 6.721LeuAla: 6.721 ± 1.104  | 2.24LeuCys: 2.24 ± 1.358  | 0.747LeuAsp: 0.747 ± 0.417  | 7.468LeuGlu: 7.468 ± 1.838  | 8.215LeuPhe: 8.215 ± 2.607  | 8.962LeuGly: 8.962 ± 1.594  | 2.24LeuHis: 2.24 ± 1.251  | 1.494LeuIle: 1.494 ± 0.834  | 1.494LeuLys: 1.494 ± 0.834  | 8.962LeuLeu: 8.962 ± 2.136  | 1.494LeuMet: 1.494 ± 0.828  | 2.24LeuAsn: 2.24 ± 0.726  | 4.481LeuPro: 4.481 ± 0.805  | 5.228LeuGln: 5.228 ± 0.985  | 0.747LeuArg: 0.747 ± 0.417  | 5.975LeuSer: 5.975 ± 1.458  | 2.987LeuThr: 2.987 ± 1.667  | 5.975LeuVal: 5.975 ± 1.91  | 0.0LeuTrp: 0.0 ± 0.0  | 2.987LeuTyr: 2.987 ± 0.637  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 2.987MetAla: 2.987 ± 1.656  | 0.747MetCys: 0.747 ± 0.417  | 2.24MetAsp: 2.24 ± 0.934  | 1.494MetGlu: 1.494 ± 1.238  | 2.987MetPhe: 2.987 ± 0.637  | 1.494MetGly: 1.494 ± 0.828  | 4.481MetHis: 4.481 ± 1.337  | 0.747MetIle: 0.747 ± 0.417  | 1.494MetLys: 1.494 ± 0.834  | 0.0MetLeu: 0.0 ± 0.0  | 1.494MetMet: 1.494 ± 0.794  | 0.747MetAsn: 0.747 ± 0.417  | 0.747MetPro: 0.747 ± 0.417  | 0.0MetGln: 0.0 ± 0.0  | 2.987MetArg: 2.987 ± 1.656  | 2.24MetSer: 2.24 ± 2.642  | 2.24MetThr: 2.24 ± 2.254  | 5.975MetVal: 5.975 ± 1.298  | 0.747MetTrp: 0.747 ± 0.417  | 0.747MetTyr: 0.747 ± 1.429  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 1.494AsnAla: 1.494 ± 0.628  | 1.494AsnCys: 1.494 ± 0.628  | 1.494AsnAsp: 1.494 ± 0.834  | 2.987AsnGlu: 2.987 ± 1.14  | 4.481AsnPhe: 4.481 ± 4.508  | 2.24AsnGly: 2.24 ± 0.726  | 1.494AsnHis: 1.494 ± 0.828  | 2.987AsnIle: 2.987 ± 1.136  | 1.494AsnLys: 1.494 ± 1.56  | 5.228AsnLeu: 5.228 ± 0.677  | 0.747AsnMet: 0.747 ± 0.78  | 3.734AsnAsn: 3.734 ± 2.891  | 1.494AsnPro: 1.494 ± 1.56  | 1.494AsnGln: 1.494 ± 1.055  | 2.987AsnArg: 2.987 ± 2.118  | 1.494AsnSer: 1.494 ± 0.828  | 0.747AsnThr: 0.747 ± 0.417  | 5.228AsnVal: 5.228 ± 1.579  | 0.747AsnTrp: 0.747 ± 0.417  | 0.0AsnTyr: 0.0 ± 0.0  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 3.734ProAla: 3.734 ± 1.96  | 0.747ProCys: 0.747 ± 0.417  | 1.494ProAsp: 1.494 ± 0.834  | 4.481ProGlu: 4.481 ± 1.69  | 2.24ProPhe: 2.24 ± 1.434  | 3.734ProGly: 3.734 ± 1.076  | 0.0ProHis: 0.0 ± 0.0  | 4.481ProIle: 4.481 ± 0.956  | 3.734ProLys: 3.734 ± 0.742  | 5.228ProLeu: 5.228 ± 2.667  | 2.987ProMet: 2.987 ± 1.82  | 1.494ProAsn: 1.494 ± 1.56  | 2.24ProPro: 2.24 ± 1.218  | 1.494ProGln: 1.494 ± 0.828  | 2.987ProArg: 2.987 ± 1.667  | 2.987ProSer: 2.987 ± 1.322  | 2.987ProThr: 2.987 ± 1.003  | 5.975ProVal: 5.975 ± 1.616  | 0.0ProTrp: 0.0 ± 0.0  | 0.747ProTyr: 0.747 ± 0.78  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 0.747GlnAla: 0.747 ± 0.417  | 1.494GlnCys: 1.494 ± 0.828  | 0.0GlnAsp: 0.0 ± 0.0  | 0.747GlnGlu: 0.747 ± 0.417  | 1.494GlnPhe: 1.494 ± 0.834  | 1.494GlnGly: 1.494 ± 0.628  | 1.494GlnHis: 1.494 ± 0.834  | 0.747GlnIle: 0.747 ± 0.417  | 0.0GlnLys: 0.0 ± 0.0  | 4.481GlnLeu: 4.481 ± 1.022  | 1.494GlnMet: 1.494 ± 1.56  | 2.24GlnAsn: 2.24 ± 1.434  | 1.494GlnPro: 1.494 ± 0.834  | 0.0GlnGln: 0.0 ± 0.0  | 2.24GlnArg: 2.24 ± 0.934  | 0.747GlnSer: 0.747 ± 0.78  | 2.24GlnThr: 2.24 ± 1.218  | 3.734GlnVal: 3.734 ± 1.984  | 0.0GlnTrp: 0.0 ± 0.0  | 1.494GlnTyr: 1.494 ± 1.422  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 2.987ArgAla: 2.987 ± 1.186  | 0.747ArgCys: 0.747 ± 0.417  | 2.987ArgAsp: 2.987 ± 0.637  | 2.24ArgGlu: 2.24 ± 1.199  | 8.962ArgPhe: 8.962 ± 3.736  | 3.734ArgGly: 3.734 ± 1.354  | 1.494ArgHis: 1.494 ± 0.628  | 0.747ArgIle: 0.747 ± 0.417  | 6.721ArgLys: 6.721 ± 1.818  | 6.721ArgLeu: 6.721 ± 2.686  | 3.734ArgMet: 3.734 ± 0.742  | 2.987ArgAsn: 2.987 ± 0.637  | 2.987ArgPro: 2.987 ± 1.161  | 0.747ArgGln: 0.747 ± 0.78  | 6.721ArgArg: 6.721 ± 1.067  | 4.481ArgSer: 4.481 ± 4.152  | 3.734ArgThr: 3.734 ± 1.715  | 2.987ArgVal: 2.987 ± 1.667  | 0.0ArgTrp: 0.0 ± 0.0  | 3.734ArgTyr: 3.734 ± 2.084  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 4.481SerAla: 4.481 ± 1.496  | 2.24SerCys: 2.24 ± 1.358  | 1.494SerAsp: 1.494 ± 1.718  | 2.987SerGlu: 2.987 ± 2.793  | 5.228SerPhe: 5.228 ± 2.36  | 4.481SerGly: 4.481 ± 1.451  | 3.734SerHis: 3.734 ± 1.406  | 2.24SerIle: 2.24 ± 1.353  | 5.228SerLys: 5.228 ± 4.204  | 4.481SerLeu: 4.481 ± 1.204  | 1.494SerMet: 1.494 ± 1.238  | 2.24SerAsn: 2.24 ± 2.341  | 2.987SerPro: 2.987 ± 1.161  | 2.987SerGln: 2.987 ± 0.637  | 11.202SerArg: 11.202 ± 2.937  | 3.734SerSer: 3.734 ± 4.51  | 2.24SerThr: 2.24 ± 1.353  | 2.987SerVal: 2.987 ± 1.255  | 1.494SerTrp: 1.494 ± 0.628  | 1.494SerTyr: 1.494 ± 0.834  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 5.228ThrAla: 5.228 ± 1.549  | 1.494ThrCys: 1.494 ± 0.828  | 3.734ThrAsp: 3.734 ± 0.742  | 2.24ThrGlu: 2.24 ± 0.78  | 1.494ThrPhe: 1.494 ± 0.628  | 2.987ThrGly: 2.987 ± 1.003  | 2.24ThrHis: 2.24 ± 0.934  | 2.24ThrIle: 2.24 ± 1.218  | 2.24ThrLys: 2.24 ± 1.251  | 0.747ThrLeu: 0.747 ± 0.78  | 1.494ThrMet: 1.494 ± 0.628  | 0.747ThrAsn: 0.747 ± 0.78  | 6.721ThrPro: 6.721 ± 1.104  | 2.24ThrGln: 2.24 ± 2.309  | 3.734ThrArg: 3.734 ± 1.447  | 3.734ThrSer: 3.734 ± 1.076  | 8.215ThrThr: 8.215 ± 0.596  | 2.24ThrVal: 2.24 ± 1.172  | 0.747ThrTrp: 0.747 ± 0.417  | 1.494ThrTyr: 1.494 ± 0.828  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 6.721ValAla: 6.721 ± 2.634  | 0.0ValCys: 0.0 ± 0.0  | 8.962ValAsp: 8.962 ± 2.076  | 6.721ValGlu: 6.721 ± 1.993  | 2.987ValPhe: 2.987 ± 1.361  | 5.228ValGly: 5.228 ± 1.145  | 1.494ValHis: 1.494 ± 1.238  | 8.215ValIle: 8.215 ± 3.915  | 6.721ValLys: 6.721 ± 2.802  | 7.468ValLeu: 7.468 ± 1.473  | 1.494ValMet: 1.494 ± 0.828  | 2.24ValAsn: 2.24 ± 2.341  | 5.228ValPro: 5.228 ± 2.526  | 0.0ValGln: 0.0 ± 0.0  | 2.987ValArg: 2.987 ± 1.14  | 2.24ValSer: 2.24 ± 0.726  | 0.0ValThr: 0.0 ± 0.0  | 3.734ValVal: 3.734 ± 2.449  | 1.494ValTrp: 1.494 ± 1.055  | 3.734ValTyr: 3.734 ± 1.406  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.0TrpAla: 0.0 ± 0.0  | 0.747TrpCys: 0.747 ± 0.417  | 0.747TrpAsp: 0.747 ± 0.417  | 0.0TrpGlu: 0.0 ± 0.0  | 0.0TrpPhe: 0.0 ± 0.0  | 0.747TrpGly: 0.747 ± 0.78  | 0.0TrpHis: 0.0 ± 0.0  | 0.747TrpIle: 0.747 ± 1.125  | 1.494TrpLys: 1.494 ± 0.628  | 2.24TrpLeu: 2.24 ± 1.251  | 0.0TrpMet: 0.0 ± 0.0  | 0.747TrpAsn: 0.747 ± 0.417  | 0.0TrpPro: 0.0 ± 0.0  | 0.0TrpGln: 0.0 ± 0.0  | 0.747TrpArg: 0.747 ± 0.417  | 0.0TrpSer: 0.0 ± 0.0  | 0.0TrpThr: 0.0 ± 0.0  | 0.747TrpVal: 0.747 ± 0.417  | 0.0TrpTrp: 0.0 ± 0.0  | 0.0TrpTyr: 0.0 ± 0.0  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 2.24TyrAla: 2.24 ± 0.78  | 0.747TyrCys: 0.747 ± 0.78  | 0.747TyrAsp: 0.747 ± 0.78  | 0.0TyrGlu: 0.0 ± 0.0  | 2.24TyrPhe: 2.24 ± 1.358  | 0.747TyrGly: 0.747 ± 0.417  | 0.0TyrHis: 0.0 ± 0.0  | 2.987TyrIle: 2.987 ± 1.229  | 2.987TyrLys: 2.987 ± 1.003  | 1.494TyrLeu: 1.494 ± 0.628  | 0.0TyrMet: 0.0 ± 0.0  | 0.747TyrAsn: 0.747 ± 0.417  | 0.747TyrPro: 0.747 ± 0.78  | 0.747TyrGln: 0.747 ± 0.417  | 2.987TyrArg: 2.987 ± 1.227  | 2.24TyrSer: 2.24 ± 0.78  | 2.987TyrThr: 2.987 ± 1.667  | 2.24TyrVal: 2.24 ± 0.78  | 0.0TyrTrp: 0.0 ± 0.0  | 0.747TyrTyr: 0.747 ± 0.417  | 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  | 0.747XaaGly: 0.747 ± 0.417  | 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 |