
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 | 3.526AlaAla: 3.526 ± 1.115  | 0.441AlaCys: 0.441 ± 0.871  | 1.763AlaAsp: 1.763 ± 0.831  | 3.526AlaGlu: 3.526 ± 1.909  | 3.085AlaPhe: 3.085 ± 1.226  | 3.085AlaGly: 3.085 ± 0.92  | 0.441AlaHis: 0.441 ± 0.208  | 4.848AlaIle: 4.848 ± 1.925  | 4.407AlaLys: 4.407 ± 0.991  | 3.967AlaLeu: 3.967 ± 3.497  | 2.204AlaMet: 2.204 ± 1.039  | 1.322AlaAsn: 1.322 ± 1.034  | 0.441AlaPro: 0.441 ± 0.208  | 4.848AlaGln: 4.848 ± 1.645  | 3.085AlaArg: 3.085 ± 1.455  | 3.085AlaSer: 3.085 ± 1.455  | 3.526AlaThr: 3.526 ± 1.13  | 4.407AlaVal: 4.407 ± 0.889  | 1.763AlaTrp: 1.763 ± 0.831  | 3.085AlaTyr: 3.085 ± 0.92  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.881CysAla: 0.881 ± 0.758  | 0.441CysCys: 0.441 ± 0.208  | 0.441CysAsp: 0.441 ± 0.208  | 0.0CysGlu: 0.0 ± 0.0  | 1.322CysPhe: 1.322 ± 0.624  | 0.881CysGly: 0.881 ± 0.416  | 0.441CysHis: 0.441 ± 0.208  | 0.881CysIle: 0.881 ± 1.366  | 2.644CysLys: 2.644 ± 1.247  | 0.441CysLeu: 0.441 ± 0.208  | 0.881CysMet: 0.881 ± 1.174  | 0.441CysAsn: 0.441 ± 0.208  | 0.881CysPro: 0.881 ± 0.416  | 0.881CysGln: 0.881 ± 0.416  | 0.881CysArg: 0.881 ± 0.416  | 1.763CysSer: 1.763 ± 0.831  | 0.441CysThr: 0.441 ± 0.208  | 0.0CysVal: 0.0 ± 0.0  | 0.0CysTrp: 0.0 ± 0.0  | 0.441CysTyr: 0.441 ± 0.208  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 1.763AspAla: 1.763 ± 0.831  | 0.441AspCys: 0.441 ± 0.208  | 2.204AspAsp: 2.204 ± 1.039  | 5.729AspGlu: 5.729 ± 1.573  | 2.204AspPhe: 2.204 ± 0.844  | 2.204AspGly: 2.204 ± 1.039  | 0.881AspHis: 0.881 ± 0.416  | 2.204AspIle: 2.204 ± 1.039  | 2.644AspLys: 2.644 ± 2.068  | 3.526AspLeu: 3.526 ± 2.558  | 0.881AspMet: 0.881 ± 0.416  | 4.407AspAsn: 4.407 ± 1.484  | 2.204AspPro: 2.204 ± 0.998  | 2.204AspGln: 2.204 ± 0.844  | 1.322AspArg: 1.322 ± 0.624  | 2.644AspSer: 2.644 ± 4.841  | 2.204AspThr: 2.204 ± 1.039  | 0.441AspVal: 0.441 ± 0.208  | 0.441AspTrp: 0.441 ± 0.871  | 2.204AspTyr: 2.204 ± 1.039  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 5.729GluAla: 5.729 ± 4.261  | 0.881GluCys: 0.881 ± 0.416  | 7.052GluAsp: 7.052 ± 1.306  | 13.662GluGlu: 13.662 ± 1.303  | 2.204GluPhe: 2.204 ± 1.039  | 5.729GluGly: 5.729 ± 2.702  | 1.763GluHis: 1.763 ± 0.831  | 5.289GluIle: 5.289 ± 3.159  | 9.255GluLys: 9.255 ± 4.286  | 3.526GluLeu: 3.526 ± 1.13  | 0.881GluMet: 0.881 ± 0.416  | 3.526GluAsn: 3.526 ± 0.855  | 2.204GluPro: 2.204 ± 0.844  | 4.848GluGln: 4.848 ± 3.349  | 4.407GluArg: 4.407 ± 1.396  | 4.848GluSer: 4.848 ± 1.562  | 3.967GluThr: 3.967 ± 1.871  | 5.729GluVal: 5.729 ± 2.702  | 0.441GluTrp: 0.441 ± 0.208  | 2.644GluTyr: 2.644 ± 1.379  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 2.644PheAla: 2.644 ± 1.247  | 1.763PheCys: 1.763 ± 0.831  | 1.763PheAsp: 1.763 ± 0.831  | 1.763PheGlu: 1.763 ± 0.92  | 0.0PhePhe: 0.0 ± 0.0  | 0.441PheGly: 0.441 ± 0.208  | 0.881PheHis: 0.881 ± 1.174  | 4.407PheIle: 4.407 ± 2.079  | 3.526PheLys: 3.526 ± 1.909  | 2.644PheLeu: 2.644 ± 0.937  | 0.441PheMet: 0.441 ± 0.746  | 1.763PheAsn: 1.763 ± 0.831  | 0.441PhePro: 0.441 ± 0.208  | 0.881PheGln: 0.881 ± 0.416  | 1.763PheArg: 1.763 ± 0.831  | 2.644PheSer: 2.644 ± 0.814  | 2.204PheThr: 2.204 ± 0.844  | 0.441PheVal: 0.441 ± 0.208  | 0.441PheTrp: 0.441 ± 0.208  | 1.763PheTyr: 1.763 ± 1.966  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 2.204GlyAla: 2.204 ± 1.039  | 1.322GlyCys: 1.322 ± 0.624  | 1.322GlyAsp: 1.322 ± 0.689  | 5.729GlyGlu: 5.729 ± 2.702  | 1.763GlyPhe: 1.763 ± 1.095  | 2.644GlyGly: 2.644 ± 1.247  | 0.441GlyHis: 0.441 ± 0.208  | 3.967GlyIle: 3.967 ± 1.303  | 5.289GlyLys: 5.289 ± 2.607  | 4.407GlyLeu: 4.407 ± 0.991  | 1.763GlyMet: 1.763 ± 0.774  | 1.322GlyAsn: 1.322 ± 0.624  | 1.763GlyPro: 1.763 ± 1.095  | 1.322GlyGln: 1.322 ± 0.624  | 5.729GlyArg: 5.729 ± 1.965  | 3.085GlySer: 3.085 ± 2.054  | 1.322GlyThr: 1.322 ± 0.624  | 3.967GlyVal: 3.967 ± 1.871  | 1.322GlyTrp: 1.322 ± 0.624  | 3.526GlyTyr: 3.526 ± 1.663  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.322HisAla: 1.322 ± 0.624  | 1.763HisCys: 1.763 ± 0.831  | 0.441HisAsp: 0.441 ± 1.331  | 0.881HisGlu: 0.881 ± 0.416  | 0.441HisPhe: 0.441 ± 0.208  | 1.322HisGly: 1.322 ± 0.689  | 0.881HisHis: 0.881 ± 0.758  | 2.204HisIle: 2.204 ± 1.039  | 1.322HisLys: 1.322 ± 1.034  | 1.322HisLeu: 1.322 ± 2.501  | 0.0HisMet: 0.0 ± 0.0  | 2.644HisAsn: 2.644 ± 1.36  | 0.0HisPro: 0.0 ± 0.0  | 1.322HisGln: 1.322 ± 0.624  | 1.763HisArg: 1.763 ± 0.831  | 2.644HisSer: 2.644 ± 0.937  | 0.441HisThr: 0.441 ± 0.208  | 2.204HisVal: 2.204 ± 1.039  | 1.322HisTrp: 1.322 ± 1.034  | 0.441HisTyr: 0.441 ± 0.208  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 4.848IleAla: 4.848 ± 1.645  | 0.881IleCys: 0.881 ± 0.416  | 3.526IleAsp: 3.526 ± 0.95  | 5.289IleGlu: 5.289 ± 1.628  | 2.644IlePhe: 2.644 ± 1.247  | 3.526IleGly: 3.526 ± 1.13  | 2.644IleHis: 2.644 ± 1.247  | 4.848IleIle: 4.848 ± 1.26  | 3.967IleLys: 3.967 ± 2.448  | 5.729IleLeu: 5.729 ± 1.695  | 1.763IleMet: 1.763 ± 0.831  | 2.644IleAsn: 2.644 ± 0.814  | 5.289IlePro: 5.289 ± 1.864  | 4.407IleGln: 4.407 ± 1.996  | 4.407IleArg: 4.407 ± 1.484  | 4.407IleSer: 4.407 ± 2.195  | 3.085IleThr: 3.085 ± 0.837  | 2.644IleVal: 2.644 ± 1.247  | 0.0IleTrp: 0.0 ± 0.0  | 0.881IleTyr: 0.881 ± 1.366  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 6.611LysAla: 6.611 ± 0.371  | 1.763LysCys: 1.763 ± 0.831  | 2.644LysAsp: 2.644 ± 1.36  | 8.814LysGlu: 8.814 ± 4.627  | 3.526LysPhe: 3.526 ± 2.558  | 4.848LysGly: 4.848 ± 4.444  | 1.322LysHis: 1.322 ± 1.034  | 6.17LysIle: 6.17 ± 3.893  | 8.374LysLys: 8.374 ± 2.874  | 5.289LysLeu: 5.289 ± 1.477  | 2.644LysMet: 2.644 ± 0.834  | 4.848LysAsn: 4.848 ± 1.309  | 5.289LysPro: 5.289 ± 0.676  | 4.848LysGln: 4.848 ± 2.864  | 4.848LysArg: 4.848 ± 2.504  | 6.17LysSer: 6.17 ± 3.227  | 1.763LysThr: 1.763 ± 0.831  | 3.967LysVal: 3.967 ± 5.54  | 0.881LysTrp: 0.881 ± 0.416  | 1.322LysTyr: 1.322 ± 0.624  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 3.085LeuAla: 3.085 ± 0.961  | 1.763LeuCys: 1.763 ± 0.92  | 3.526LeuAsp: 3.526 ± 4.016  | 6.17LeuGlu: 6.17 ± 3.995  | 1.322LeuPhe: 1.322 ± 0.624  | 3.967LeuGly: 3.967 ± 1.042  | 3.526LeuHis: 3.526 ± 1.115  | 4.407LeuIle: 4.407 ± 3.447  | 6.611LeuLys: 6.611 ± 4.159  | 9.255LeuLeu: 9.255 ± 6.822  | 0.881LeuMet: 0.881 ± 2.024  | 3.967LeuAsn: 3.967 ± 1.042  | 3.085LeuPro: 3.085 ± 1.354  | 3.526LeuGln: 3.526 ± 1.13  | 3.967LeuArg: 3.967 ± 1.303  | 6.17LeuSer: 6.17 ± 2.972  | 4.407LeuThr: 4.407 ± 2.978  | 4.848LeuVal: 4.848 ± 0.991  | 0.441LeuTrp: 0.441 ± 0.208  | 2.644LeuTyr: 2.644 ± 1.247  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 0.881MetAla: 0.881 ± 0.416  | 0.0MetCys: 0.0 ± 0.0  | 0.881MetAsp: 0.881 ± 0.416  | 4.407MetGlu: 4.407 ± 2.038  | 0.881MetPhe: 0.881 ± 0.758  | 0.881MetGly: 0.881 ± 1.366  | 0.881MetHis: 0.881 ± 0.416  | 0.881MetIle: 0.881 ± 0.416  | 3.526MetLys: 3.526 ± 0.907  | 0.441MetLeu: 0.441 ± 0.208  | 0.881MetMet: 0.881 ± 0.416  | 0.441MetAsn: 0.441 ± 0.208  | 1.322MetPro: 1.322 ± 0.624  | 2.204MetGln: 2.204 ± 1.039  | 2.204MetArg: 2.204 ± 1.039  | 2.204MetSer: 2.204 ± 1.771  | 1.322MetThr: 1.322 ± 0.624  | 0.881MetVal: 0.881 ± 0.416  | 0.441MetTrp: 0.441 ± 0.208  | 0.881MetTyr: 0.881 ± 0.416  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 1.322AsnAla: 1.322 ± 1.221  | 0.0AsnCys: 0.0 ± 0.0  | 2.644AsnAsp: 2.644 ± 1.247  | 3.085AsnGlu: 3.085 ± 0.972  | 2.204AsnPhe: 2.204 ± 0.844  | 0.881AsnGly: 0.881 ± 0.416  | 1.763AsnHis: 1.763 ± 3.831  | 2.204AsnIle: 2.204 ± 1.039  | 2.204AsnLys: 2.204 ± 1.039  | 6.611AsnLeu: 6.611 ± 3.898  | 0.881AsnMet: 0.881 ± 0.758  | 2.644AsnAsn: 2.644 ± 1.096  | 1.763AsnPro: 1.763 ± 0.831  | 2.204AsnGln: 2.204 ± 0.844  | 0.881AsnArg: 0.881 ± 0.416  | 4.407AsnSer: 4.407 ± 1.484  | 3.967AsnThr: 3.967 ± 1.017  | 2.204AsnVal: 2.204 ± 1.039  | 0.881AsnTrp: 0.881 ± 0.416  | 2.204AsnTyr: 2.204 ± 0.733  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 3.967ProAla: 3.967 ± 1.871  | 0.0ProCys: 0.0 ± 0.0  | 1.322ProAsp: 1.322 ± 0.624  | 4.848ProGlu: 4.848 ± 1.26  | 1.763ProPhe: 1.763 ± 0.831  | 3.085ProGly: 3.085 ± 1.455  | 0.881ProHis: 0.881 ± 0.416  | 1.763ProIle: 1.763 ± 0.831  | 3.526ProLys: 3.526 ± 2.558  | 4.848ProLeu: 4.848 ± 1.305  | 0.881ProMet: 0.881 ± 0.416  | 0.441ProAsn: 0.441 ± 0.208  | 1.763ProPro: 1.763 ± 0.831  | 2.644ProGln: 2.644 ± 1.247  | 1.322ProArg: 1.322 ± 0.624  | 1.763ProSer: 1.763 ± 0.831  | 2.644ProThr: 2.644 ± 0.937  | 1.763ProVal: 1.763 ± 0.68  | 0.441ProTrp: 0.441 ± 0.208  | 1.763ProTyr: 1.763 ± 1.095  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 4.407GlnAla: 4.407 ± 2.452  | 0.441GlnCys: 0.441 ± 0.208  | 1.322GlnAsp: 1.322 ± 0.624  | 5.729GlnGlu: 5.729 ± 1.212  | 1.322GlnPhe: 1.322 ± 1.034  | 3.967GlnGly: 3.967 ± 1.871  | 3.526GlnHis: 3.526 ± 0.95  | 3.526GlnIle: 3.526 ± 1.663  | 4.407GlnLys: 4.407 ± 1.876  | 6.611GlnLeu: 6.611 ± 5.849  | 2.204GlnMet: 2.204 ± 1.039  | 1.763GlnAsn: 1.763 ± 1.966  | 3.967GlnPro: 3.967 ± 1.017  | 5.729GlnGln: 5.729 ± 1.114  | 2.204GlnArg: 2.204 ± 1.039  | 2.204GlnSer: 2.204 ± 0.998  | 2.644GlnThr: 2.644 ± 0.814  | 1.763GlnVal: 1.763 ± 0.92  | 1.322GlnTrp: 1.322 ± 0.624  | 3.085GlnTyr: 3.085 ± 0.837  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 1.322ArgAla: 1.322 ± 0.624  | 0.441ArgCys: 0.441 ± 0.208  | 2.644ArgAsp: 2.644 ± 1.247  | 3.526ArgGlu: 3.526 ± 2.191  | 1.763ArgPhe: 1.763 ± 0.68  | 1.763ArgGly: 1.763 ± 0.831  | 1.322ArgHis: 1.322 ± 0.624  | 5.729ArgIle: 5.729 ± 1.035  | 7.052ArgLys: 7.052 ± 1.521  | 3.967ArgLeu: 3.967 ± 1.042  | 2.644ArgMet: 2.644 ± 1.247  | 2.644ArgAsn: 2.644 ± 1.247  | 2.644ArgPro: 2.644 ± 1.247  | 2.204ArgGln: 2.204 ± 0.733  | 4.407ArgArg: 4.407 ± 2.079  | 6.17ArgSer: 6.17 ± 1.943  | 2.204ArgThr: 2.204 ± 1.039  | 2.644ArgVal: 2.644 ± 2.068  | 1.322ArgTrp: 1.322 ± 0.624  | 0.441ArgTyr: 0.441 ± 0.208  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 3.526SerAla: 3.526 ± 1.115  | 1.322SerCys: 1.322 ± 1.221  | 2.644SerAsp: 2.644 ± 0.937  | 4.848SerGlu: 4.848 ± 2.282  | 2.204SerPhe: 2.204 ± 1.039  | 3.085SerGly: 3.085 ± 1.226  | 1.763SerHis: 1.763 ± 0.68  | 4.407SerIle: 4.407 ± 1.153  | 7.052SerLys: 7.052 ± 4.21  | 4.848SerLeu: 4.848 ± 2.798  | 2.204SerMet: 2.204 ± 0.733  | 4.407SerAsn: 4.407 ± 1.876  | 2.644SerPro: 2.644 ± 1.247  | 5.289SerGln: 5.289 ± 1.853  | 6.611SerArg: 6.611 ± 2.027  | 7.052SerSer: 7.052 ± 4.237  | 4.848SerThr: 4.848 ± 1.672  | 2.644SerVal: 2.644 ± 1.247  | 0.881SerTrp: 0.881 ± 0.416  | 1.763SerTyr: 1.763 ± 1.516  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 1.763ThrAla: 1.763 ± 0.92  | 1.322ThrCys: 1.322 ± 0.624  | 3.085ThrAsp: 3.085 ± 1.455  | 3.085ThrGlu: 3.085 ± 0.837  | 1.763ThrPhe: 1.763 ± 0.831  | 6.17ThrGly: 6.17 ± 1.746  | 0.441ThrHis: 0.441 ± 0.208  | 3.967ThrIle: 3.967 ± 1.017  | 3.526ThrLys: 3.526 ± 2.166  | 1.763ThrLeu: 1.763 ± 0.68  | 2.204ThrMet: 2.204 ± 1.039  | 1.763ThrAsn: 1.763 ± 0.92  | 1.763ThrPro: 1.763 ± 0.831  | 3.967ThrGln: 3.967 ± 1.042  | 3.085ThrArg: 3.085 ± 1.455  | 5.289ThrSer: 5.289 ± 2.494  | 5.289ThrThr: 5.289 ± 2.494  | 2.204ThrVal: 2.204 ± 1.039  | 0.441ThrTrp: 0.441 ± 0.208  | 0.881ThrTyr: 0.881 ± 0.416  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 3.967ValAla: 3.967 ± 1.871  | 0.0ValCys: 0.0 ± 0.0  | 2.204ValAsp: 2.204 ± 0.998  | 3.526ValGlu: 3.526 ± 1.841  | 1.322ValPhe: 1.322 ± 0.624  | 3.526ValGly: 3.526 ± 1.841  | 0.0ValHis: 0.0 ± 0.0  | 2.644ValIle: 2.644 ± 1.36  | 2.204ValLys: 2.204 ± 0.733  | 2.204ValLeu: 2.204 ± 0.998  | 0.881ValMet: 0.881 ± 0.416  | 1.322ValAsn: 1.322 ± 0.624  | 2.644ValPro: 2.644 ± 0.937  | 5.729ValGln: 5.729 ± 0.763  | 2.204ValArg: 2.204 ± 0.733  | 3.967ValSer: 3.967 ± 0.792  | 5.729ValThr: 5.729 ± 1.573  | 2.204ValVal: 2.204 ± 0.733  | 0.0ValTrp: 0.0 ± 0.0  | 1.322ValTyr: 1.322 ± 0.624  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.0TrpAla: 0.0 ± 0.0  | 0.0TrpCys: 0.0 ± 0.0  | 0.0TrpAsp: 0.0 ± 0.0  | 2.204TrpGlu: 2.204 ± 1.039  | 0.441TrpPhe: 0.441 ± 0.208  | 1.322TrpGly: 1.322 ± 0.624  | 0.0TrpHis: 0.0 ± 0.0  | 0.441TrpIle: 0.441 ± 0.208  | 2.204TrpLys: 2.204 ± 1.039  | 1.763TrpLeu: 1.763 ± 0.68  | 0.441TrpMet: 0.441 ± 0.208  | 0.441TrpAsn: 0.441 ± 0.208  | 0.0TrpPro: 0.0 ± 0.0  | 0.881TrpGln: 0.881 ± 0.416  | 0.441TrpArg: 0.441 ± 0.208  | 0.881TrpSer: 0.881 ± 0.416  | 1.322TrpThr: 1.322 ± 0.624  | 1.322TrpVal: 1.322 ± 1.034  | 0.441TrpTrp: 0.441 ± 0.208  | 0.0TrpTyr: 0.0 ± 0.0  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 3.085TyrAla: 3.085 ± 1.226  | 0.0TyrCys: 0.0 ± 0.0  | 1.322TyrAsp: 1.322 ± 1.034  | 1.763TyrGlu: 1.763 ± 0.831  | 0.441TyrPhe: 0.441 ± 0.208  | 0.881TyrGly: 0.881 ± 0.758  | 0.881TyrHis: 0.881 ± 0.416  | 2.644TyrIle: 2.644 ± 1.247  | 2.644TyrLys: 2.644 ± 0.937  | 4.407TyrLeu: 4.407 ± 0.78  | 0.441TyrMet: 0.441 ± 0.208  | 2.204TyrAsn: 2.204 ± 1.039  | 1.322TyrPro: 1.322 ± 0.624  | 2.204TyrGln: 2.204 ± 1.51  | 1.322TyrArg: 1.322 ± 0.624  | 2.644TyrSer: 2.644 ± 1.247  | 0.441TyrThr: 0.441 ± 0.208  | 1.322TyrVal: 1.322 ± 1.845  | 1.322TyrTrp: 1.322 ± 0.624  | 1.322TyrTyr: 1.322 ± 0.689  | 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 |