
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 | 7.493AlaAla: 7.493 ± 0.505  | 0.696AlaCys: 0.696 ± 0.099  | 4.875AlaAsp: 4.875 ± 0.308  | 5.107AlaGlu: 5.107 ± 0.222  | 3.379AlaPhe: 3.379 ± 0.232  | 5.648AlaGly: 5.648 ± 0.34  | 1.548AlaHis: 1.548 ± 0.139  | 4.578AlaIle: 4.578 ± 0.267  | 4.398AlaLys: 4.398 ± 0.281  | 7.17AlaLeu: 7.17 ± 0.307  | 2.489AlaMet: 2.489 ± 0.19  | 3.572AlaAsn: 3.572 ± 0.233  | 2.889AlaPro: 2.889 ± 0.211  | 3.043AlaGln: 3.043 ± 0.255  | 3.766AlaArg: 3.766 ± 0.211  | 4.552AlaSer: 4.552 ± 0.28  | 4.797AlaThr: 4.797 ± 0.287  | 5.777AlaVal: 5.777 ± 0.298  | 1.161AlaTrp: 1.161 ± 0.133  | 2.992AlaTyr: 2.992 ± 0.198  | 0.0AlaXaa: 0.0 ± 0.0  | 
| Cys | 0.49CysAla: 0.49 ± 0.079  | 0.052CysCys: 0.052 ± 0.025  | 0.374CysAsp: 0.374 ± 0.066  | 0.464CysGlu: 0.464 ± 0.08  | 0.232CysPhe: 0.232 ± 0.047  | 0.645CysGly: 0.645 ± 0.112  | 0.31CysHis: 0.31 ± 0.071  | 0.49CysIle: 0.49 ± 0.085  | 0.426CysLys: 0.426 ± 0.072  | 0.812CysLeu: 0.812 ± 0.089  | 0.284CysMet: 0.284 ± 0.057  | 0.451CysAsn: 0.451 ± 0.087  | 0.387CysPro: 0.387 ± 0.065  | 0.258CysGln: 0.258 ± 0.061  | 0.555CysArg: 0.555 ± 0.08  | 0.929CysSer: 0.929 ± 0.222  | 0.671CysThr: 0.671 ± 0.103  | 0.8CysVal: 0.8 ± 0.129  | 0.103CysTrp: 0.103 ± 0.044  | 0.413CysTyr: 0.413 ± 0.064  | 0.0CysXaa: 0.0 ± 0.0  | 
| Asp | 5.623AspAla: 5.623 ± 0.192  | 0.503AspCys: 0.503 ± 0.092  | 4.462AspAsp: 4.462 ± 0.295  | 4.23AspGlu: 4.23 ± 0.285  | 2.566AspPhe: 2.566 ± 0.184  | 4.707AspGly: 4.707 ± 0.273  | 1.238AspHis: 1.238 ± 0.106  | 3.779AspIle: 3.779 ± 0.194  | 3.237AspLys: 3.237 ± 0.197  | 5.906AspLeu: 5.906 ± 0.253  | 1.56AspMet: 1.56 ± 0.132  | 2.979AspAsn: 2.979 ± 0.198  | 2.953AspPro: 2.953 ± 0.17  | 1.999AspGln: 1.999 ± 0.175  | 2.811AspArg: 2.811 ± 0.202  | 2.889AspSer: 2.889 ± 0.213  | 3.521AspThr: 3.521 ± 0.205  | 5.133AspVal: 5.133 ± 0.261  | 1.212AspTrp: 1.212 ± 0.113  | 2.566AspTyr: 2.566 ± 0.18  | 0.0AspXaa: 0.0 ± 0.0  | 
| Glu | 4.462GluAla: 4.462 ± 0.239  | 0.503GluCys: 0.503 ± 0.095  | 3.546GluAsp: 3.546 ± 0.235  | 3.791GluGlu: 3.791 ± 0.289  | 2.528GluPhe: 2.528 ± 0.163  | 3.74GluGly: 3.74 ± 0.224  | 1.328GluHis: 1.328 ± 0.133  | 3.495GluIle: 3.495 ± 0.193  | 3.559GluLys: 3.559 ± 0.227  | 6.667GluLeu: 6.667 ± 0.317  | 1.844GluMet: 1.844 ± 0.158  | 2.992GluAsn: 2.992 ± 0.223  | 2.179GluPro: 2.179 ± 0.174  | 2.424GluGln: 2.424 ± 0.17  | 3.675GluArg: 3.675 ± 0.253  | 3.108GluSer: 3.108 ± 0.213  | 3.65GluThr: 3.65 ± 0.256  | 4.32GluVal: 4.32 ± 0.246  | 1.006GluTrp: 1.006 ± 0.104  | 2.592GluTyr: 2.592 ± 0.181  | 0.0GluXaa: 0.0 ± 0.0  | 
| Phe | 2.837PheAla: 2.837 ± 0.193  | 0.413PheCys: 0.413 ± 0.066  | 2.94PheAsp: 2.94 ± 0.218  | 2.386PheGlu: 2.386 ± 0.218  | 1.664PhePhe: 1.664 ± 0.149  | 2.85PheGly: 2.85 ± 0.175  | 0.658PheHis: 0.658 ± 0.098  | 2.038PheIle: 2.038 ± 0.142  | 2.102PheLys: 2.102 ± 0.162  | 3.018PheLeu: 3.018 ± 0.203  | 1.186PheMet: 1.186 ± 0.138  | 2.644PheAsn: 2.644 ± 0.183  | 1.664PhePro: 1.664 ± 0.171  | 1.186PheGln: 1.186 ± 0.133  | 1.986PheArg: 1.986 ± 0.163  | 2.644PheSer: 2.644 ± 0.158  | 2.966PheThr: 2.966 ± 0.227  | 2.657PheVal: 2.657 ± 0.223  | 0.632PheTrp: 0.632 ± 0.089  | 1.947PheTyr: 1.947 ± 0.162  | 0.0PheXaa: 0.0 ± 0.0  | 
| Gly | 4.359GlyAla: 4.359 ± 0.286  | 0.735GlyCys: 0.735 ± 0.13  | 3.985GlyAsp: 3.985 ± 0.249  | 4.333GlyGlu: 4.333 ± 0.179  | 3.314GlyPhe: 3.314 ± 0.194  | 5.171GlyGly: 5.171 ± 0.469  | 1.096GlyHis: 1.096 ± 0.116  | 3.675GlyIle: 3.675 ± 0.226  | 4.423GlyLys: 4.423 ± 0.297  | 5.842GlyLeu: 5.842 ± 0.318  | 2.012GlyMet: 2.012 ± 0.171  | 3.508GlyAsn: 3.508 ± 0.197  | 1.793GlyPro: 1.793 ± 0.203  | 2.541GlyGln: 2.541 ± 0.175  | 3.598GlyArg: 3.598 ± 0.209  | 3.662GlySer: 3.662 ± 0.24  | 4.243GlyThr: 4.243 ± 0.27  | 5.339GlyVal: 5.339 ± 0.222  | 1.161GlyTrp: 1.161 ± 0.124  | 2.889GlyTyr: 2.889 ± 0.173  | 0.0GlyXaa: 0.0 ± 0.0  | 
| His | 1.548HisAla: 1.548 ± 0.145  | 0.193HisCys: 0.193 ± 0.054  | 1.109HisAsp: 1.109 ± 0.133  | 1.225HisGlu: 1.225 ± 0.13  | 0.967HisPhe: 0.967 ± 0.12  | 1.251HisGly: 1.251 ± 0.131  | 0.722HisHis: 0.722 ± 0.088  | 1.174HisIle: 1.174 ± 0.134  | 0.864HisLys: 0.864 ± 0.107  | 1.87HisLeu: 1.87 ± 0.135  | 0.658HisMet: 0.658 ± 0.094  | 0.825HisAsn: 0.825 ± 0.125  | 1.29HisPro: 1.29 ± 0.156  | 0.877HisGln: 0.877 ± 0.112  | 1.135HisArg: 1.135 ± 0.126  | 0.98HisSer: 0.98 ± 0.119  | 1.303HisThr: 1.303 ± 0.133  | 1.264HisVal: 1.264 ± 0.129  | 0.297HisTrp: 0.297 ± 0.056  | 1.07HisTyr: 1.07 ± 0.118  | 0.0HisXaa: 0.0 ± 0.0  | 
| Ile | 4.475IleAla: 4.475 ± 0.287  | 0.49IleCys: 0.49 ± 0.086  | 3.933IleAsp: 3.933 ± 0.234  | 3.585IleGlu: 3.585 ± 0.205  | 1.535IlePhe: 1.535 ± 0.128  | 3.314IleGly: 3.314 ± 0.211  | 1.212IleHis: 1.212 ± 0.139  | 2.541IleIle: 2.541 ± 0.199  | 2.631IleLys: 2.631 ± 0.212  | 4.191IleLeu: 4.191 ± 0.218  | 1.109IleMet: 1.109 ± 0.11  | 3.095IleAsn: 3.095 ± 0.234  | 2.966IlePro: 2.966 ± 0.191  | 1.999IleGln: 1.999 ± 0.145  | 3.25IleArg: 3.25 ± 0.203  | 3.366IleSer: 3.366 ± 0.218  | 3.546IleThr: 3.546 ± 0.189  | 3.288IleVal: 3.288 ± 0.198  | 0.567IleTrp: 0.567 ± 0.079  | 2.167IleTyr: 2.167 ± 0.18  | 0.0IleXaa: 0.0 ± 0.0  | 
| Lys | 4.772LysAla: 4.772 ± 0.267  | 0.31LysCys: 0.31 ± 0.062  | 3.263LysAsp: 3.263 ± 0.226  | 3.804LysGlu: 3.804 ± 0.25  | 2.179LysPhe: 2.179 ± 0.184  | 3.301LysGly: 3.301 ± 0.268  | 1.225LysHis: 1.225 ± 0.119  | 2.695LysIle: 2.695 ± 0.176  | 2.863LysLys: 2.863 ± 0.195  | 5.584LysLeu: 5.584 ± 0.285  | 1.728LysMet: 1.728 ± 0.142  | 2.192LysAsn: 2.192 ± 0.196  | 2.334LysPro: 2.334 ± 0.157  | 2.115LysGln: 2.115 ± 0.15  | 2.979LysArg: 2.979 ± 0.224  | 2.863LysSer: 2.863 ± 0.203  | 3.263LysThr: 3.263 ± 0.218  | 3.804LysVal: 3.804 ± 0.238  | 0.683LysTrp: 0.683 ± 0.094  | 1.87LysTyr: 1.87 ± 0.153  | 0.0LysXaa: 0.0 ± 0.0  | 
| Leu | 7.119LeuAla: 7.119 ± 0.293  | 0.89LeuCys: 0.89 ± 0.119  | 6.113LeuAsp: 6.113 ± 0.275  | 4.926LeuGlu: 4.926 ± 0.247  | 3.417LeuPhe: 3.417 ± 0.208  | 5.429LeuGly: 5.429 ± 0.27  | 1.831LeuHis: 1.831 ± 0.163  | 4.062LeuIle: 4.062 ± 0.203  | 5.274LeuLys: 5.274 ± 0.231  | 7.093LeuLeu: 7.093 ± 0.309  | 2.502LeuMet: 2.502 ± 0.196  | 5.133LeuAsn: 5.133 ± 0.305  | 5.029LeuPro: 5.029 ± 0.248  | 3.314LeuGln: 3.314 ± 0.226  | 5.365LeuArg: 5.365 ± 0.291  | 6.087LeuSer: 6.087 ± 0.239  | 6.809LeuThr: 6.809 ± 0.287  | 5.429LeuVal: 5.429 ± 0.239  | 1.045LeuTrp: 1.045 ± 0.118  | 3.172LeuTyr: 3.172 ± 0.213  | 0.0LeuXaa: 0.0 ± 0.0  | 
| Met | 2.489MetAla: 2.489 ± 0.154  | 0.4MetCys: 0.4 ± 0.07  | 1.56MetAsp: 1.56 ± 0.146  | 1.586MetGlu: 1.586 ± 0.151  | 1.032MetPhe: 1.032 ± 0.113  | 1.702MetGly: 1.702 ± 0.167  | 0.464MetHis: 0.464 ± 0.07  | 1.135MetIle: 1.135 ± 0.111  | 1.896MetLys: 1.896 ± 0.15  | 2.566MetLeu: 2.566 ± 0.179  | 0.761MetMet: 0.761 ± 0.106  | 1.303MetAsn: 1.303 ± 0.128  | 0.954MetPro: 0.954 ± 0.112  | 1.032MetGln: 1.032 ± 0.099  | 1.651MetArg: 1.651 ± 0.137  | 2.102MetSer: 2.102 ± 0.143  | 1.664MetThr: 1.664 ± 0.149  | 1.78MetVal: 1.78 ± 0.161  | 0.4MetTrp: 0.4 ± 0.072  | 1.045MetTyr: 1.045 ± 0.116  | 0.0MetXaa: 0.0 ± 0.0  | 
| Asn | 4.333AsnAla: 4.333 ± 0.254  | 0.271AsnCys: 0.271 ± 0.057  | 2.876AsnAsp: 2.876 ± 0.172  | 2.837AsnGlu: 2.837 ± 0.202  | 1.78AsnPhe: 1.78 ± 0.144  | 4.256AsnGly: 4.256 ± 0.265  | 0.993AsnHis: 0.993 ± 0.116  | 2.592AsnIle: 2.592 ± 0.178  | 2.399AsnLys: 2.399 ± 0.15  | 4.539AsnLeu: 4.539 ± 0.241  | 1.225AsnMet: 1.225 ± 0.123  | 2.063AsnAsn: 2.063 ± 0.172  | 3.018AsnPro: 3.018 ± 0.223  | 1.664AsnGln: 1.664 ± 0.155  | 2.553AsnArg: 2.553 ± 0.153  | 2.412AsnSer: 2.412 ± 0.175  | 3.031AsnThr: 3.031 ± 0.166  | 3.611AsnVal: 3.611 ± 0.219  | 0.864AsnTrp: 0.864 ± 0.106  | 1.651AsnTyr: 1.651 ± 0.118  | 0.0AsnXaa: 0.0 ± 0.0  | 
| Pro | 3.366ProAla: 3.366 ± 0.188  | 0.245ProCys: 0.245 ± 0.053  | 3.417ProAsp: 3.417 ± 0.218  | 3.288ProGlu: 3.288 ± 0.206  | 1.728ProPhe: 1.728 ± 0.176  | 2.902ProGly: 2.902 ± 0.2  | 0.98ProHis: 0.98 ± 0.117  | 2.321ProIle: 2.321 ± 0.173  | 2.128ProLys: 2.128 ± 0.166  | 3.43ProLeu: 3.43 ± 0.192  | 1.186ProMet: 1.186 ± 0.11  | 2.063ProAsn: 2.063 ± 0.179  | 1.754ProPro: 1.754 ± 0.146  | 1.625ProGln: 1.625 ± 0.16  | 2.154ProArg: 2.154 ± 0.186  | 2.476ProSer: 2.476 ± 0.153  | 3.495ProThr: 3.495 ± 0.211  | 3.766ProVal: 3.766 ± 0.264  | 0.516ProTrp: 0.516 ± 0.071  | 1.509ProTyr: 1.509 ± 0.167  | 0.0ProXaa: 0.0 ± 0.0  | 
| Gln | 3.172GlnAla: 3.172 ± 0.241  | 0.374GlnCys: 0.374 ± 0.069  | 1.818GlnAsp: 1.818 ± 0.167  | 2.141GlnGlu: 2.141 ± 0.151  | 1.599GlnPhe: 1.599 ± 0.121  | 2.347GlnGly: 2.347 ± 0.175  | 0.761GlnHis: 0.761 ± 0.091  | 1.857GlnIle: 1.857 ± 0.143  | 1.689GlnLys: 1.689 ± 0.178  | 3.804GlnLeu: 3.804 ± 0.219  | 1.225GlnMet: 1.225 ± 0.113  | 1.638GlnAsn: 1.638 ± 0.131  | 1.844GlnPro: 1.844 ± 0.144  | 1.947GlnGln: 1.947 ± 0.171  | 2.644GlnArg: 2.644 ± 0.229  | 2.089GlnSer: 2.089 ± 0.181  | 2.038GlnThr: 2.038 ± 0.191  | 2.476GlnVal: 2.476 ± 0.17  | 0.593GlnTrp: 0.593 ± 0.09  | 1.548GlnTyr: 1.548 ± 0.139  | 0.0GlnXaa: 0.0 ± 0.0  | 
| Arg | 3.869ArgAla: 3.869 ± 0.217  | 0.671ArgCys: 0.671 ± 0.088  | 3.327ArgAsp: 3.327 ± 0.251  | 3.263ArgGlu: 3.263 ± 0.217  | 2.631ArgPhe: 2.631 ± 0.184  | 3.211ArgGly: 3.211 ± 0.21  | 1.251ArgHis: 1.251 ± 0.137  | 3.147ArgIle: 3.147 ± 0.203  | 3.185ArgLys: 3.185 ± 0.243  | 5.004ArgLeu: 5.004 ± 0.267  | 1.767ArgMet: 1.767 ± 0.151  | 2.863ArgAsn: 2.863 ± 0.191  | 1.986ArgPro: 1.986 ± 0.174  | 1.986ArgGln: 1.986 ± 0.174  | 3.263ArgArg: 3.263 ± 0.264  | 2.669ArgSer: 2.669 ± 0.205  | 2.786ArgThr: 2.786 ± 0.22  | 4.153ArgVal: 4.153 ± 0.241  | 1.122ArgTrp: 1.122 ± 0.144  | 2.257ArgTyr: 2.257 ± 0.167  | 0.0ArgXaa: 0.0 ± 0.0  | 
| Ser | 4.346SerAla: 4.346 ± 0.336  | 0.464SerCys: 0.464 ± 0.103  | 3.417SerAsp: 3.417 ± 0.2  | 3.276SerGlu: 3.276 ± 0.241  | 2.321SerPhe: 2.321 ± 0.154  | 4.333SerGly: 4.333 ± 0.334  | 1.006SerHis: 1.006 ± 0.13  | 3.327SerIle: 3.327 ± 0.188  | 3.263SerLys: 3.263 ± 0.224  | 5.494SerLeu: 5.494 ± 0.235  | 1.457SerMet: 1.457 ± 0.128  | 2.682SerAsn: 2.682 ± 0.193  | 2.437SerPro: 2.437 ± 0.193  | 2.283SerGln: 2.283 ± 0.168  | 3.005SerArg: 3.005 ± 0.179  | 3.585SerSer: 3.585 ± 0.234  | 3.559SerThr: 3.559 ± 0.233  | 3.908SerVal: 3.908 ± 0.219  | 0.825SerTrp: 0.825 ± 0.098  | 1.793SerTyr: 1.793 ± 0.159  | 0.0SerXaa: 0.0 ± 0.0  | 
| Thr | 4.952ThrAla: 4.952 ± 0.342  | 0.722ThrCys: 0.722 ± 0.113  | 4.127ThrAsp: 4.127 ± 0.236  | 3.546ThrGlu: 3.546 ± 0.219  | 2.695ThrPhe: 2.695 ± 0.206  | 4.733ThrGly: 4.733 ± 0.266  | 1.225ThrHis: 1.225 ± 0.132  | 3.379ThrIle: 3.379 ± 0.232  | 3.031ThrLys: 3.031 ± 0.204  | 6.409ThrLeu: 6.409 ± 0.321  | 1.444ThrMet: 1.444 ± 0.129  | 2.76ThrAsn: 2.76 ± 0.187  | 3.34ThrPro: 3.34 ± 0.224  | 2.424ThrGln: 2.424 ± 0.173  | 3.25ThrArg: 3.25 ± 0.218  | 3.224ThrSer: 3.224 ± 0.184  | 4.32ThrThr: 4.32 ± 0.35  | 5.223ThrVal: 5.223 ± 0.278  | 1.057ThrTrp: 1.057 ± 0.122  | 2.27ThrTyr: 2.27 ± 0.167  | 0.0ThrXaa: 0.0 ± 0.0  | 
| Val | 6.332ValAla: 6.332 ± 0.326  | 0.619ValCys: 0.619 ± 0.095  | 4.823ValAsp: 4.823 ± 0.257  | 4.823ValGlu: 4.823 ± 0.291  | 2.682ValPhe: 2.682 ± 0.195  | 4.578ValGly: 4.578 ± 0.268  | 1.264ValHis: 1.264 ± 0.136  | 4.165ValIle: 4.165 ± 0.225  | 3.92ValLys: 3.92 ± 0.198  | 5.455ValLeu: 5.455 ± 0.227  | 1.676ValMet: 1.676 ± 0.165  | 3.534ValAsn: 3.534 ± 0.215  | 3.172ValPro: 3.172 ± 0.23  | 2.437ValGln: 2.437 ± 0.214  | 3.611ValArg: 3.611 ± 0.199  | 4.243ValSer: 4.243 ± 0.251  | 5.455ValThr: 5.455 ± 0.261  | 5.429ValVal: 5.429 ± 0.29  | 1.096ValTrp: 1.096 ± 0.134  | 2.682ValTyr: 2.682 ± 0.185  | 0.0ValXaa: 0.0 ± 0.0  | 
| Trp | 0.993TrpAla: 0.993 ± 0.103  | 0.129TrpCys: 0.129 ± 0.044  | 1.109TrpAsp: 1.109 ± 0.105  | 0.954TrpGlu: 0.954 ± 0.099  | 0.645TrpPhe: 0.645 ± 0.1  | 0.825TrpGly: 0.825 ± 0.11  | 0.374TrpHis: 0.374 ± 0.071  | 0.812TrpIle: 0.812 ± 0.104  | 0.864TrpLys: 0.864 ± 0.089  | 1.676TrpLeu: 1.676 ± 0.164  | 0.4TrpMet: 0.4 ± 0.063  | 0.619TrpAsn: 0.619 ± 0.079  | 0.606TrpPro: 0.606 ± 0.098  | 0.606TrpGln: 0.606 ± 0.106  | 0.838TrpArg: 0.838 ± 0.11  | 0.89TrpSer: 0.89 ± 0.091  | 0.671TrpThr: 0.671 ± 0.091  | 1.199TrpVal: 1.199 ± 0.115  | 0.271TrpTrp: 0.271 ± 0.066  | 0.671TrpTyr: 0.671 ± 0.101  | 0.0TrpXaa: 0.0 ± 0.0  | 
| Tyr | 2.902TyrAla: 2.902 ± 0.195  | 0.464TyrCys: 0.464 ± 0.089  | 2.798TyrAsp: 2.798 ± 0.194  | 1.844TyrGlu: 1.844 ± 0.149  | 1.522TyrPhe: 1.522 ± 0.129  | 2.734TyrGly: 2.734 ± 0.196  | 1.135TyrHis: 1.135 ± 0.137  | 1.999TyrIle: 1.999 ± 0.175  | 1.689TyrLys: 1.689 ± 0.141  | 3.508TyrLeu: 3.508 ± 0.206  | 0.993TyrMet: 0.993 ± 0.118  | 2.05TyrAsn: 2.05 ± 0.163  | 1.754TyrPro: 1.754 ± 0.149  | 1.844TyrGln: 1.844 ± 0.161  | 2.321TyrArg: 2.321 ± 0.166  | 1.999TyrSer: 1.999 ± 0.169  | 2.347TyrThr: 2.347 ± 0.167  | 2.644TyrVal: 2.644 ± 0.217  | 0.542TyrTrp: 0.542 ± 0.071  | 1.767TyrTyr: 1.767 ± 0.173  | 0.013TyrXaa: 0.013 ± 0.012  | 
| 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  | 0.013XaaSer: 0.013 ± 0.012  | 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 |