Amino acid dipepetide frequency for Aphis craccivora (Cowpea aphid)

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	4.134AlaAla: 4.134 ± 0.047	0.953AlaCys: 0.953 ± 0.011	2.526AlaAsp: 2.526 ± 0.018	2.79AlaGlu: 2.79 ± 0.021	2.018AlaPhe: 2.018 ± 0.016	2.39AlaGly: 2.39 ± 0.021	1.123AlaHis: 1.123 ± 0.011	3.398AlaIle: 3.398 ± 0.018	3.159AlaLys: 3.159 ± 0.02	4.617AlaLeu: 4.617 ± 0.026	1.205AlaMet: 1.205 ± 0.011	2.429AlaAsn: 2.429 ± 0.014	2.002AlaPro: 2.002 ± 0.021	1.658AlaGln: 1.658 ± 0.014	2.225AlaArg: 2.225 ± 0.018	3.694AlaSer: 3.694 ± 0.021	3.017AlaThr: 3.017 ± 0.02	3.516AlaVal: 3.516 ± 0.025	0.484AlaTrp: 0.484 ± 0.007	1.595AlaTyr: 1.595 ± 0.017	0.0AlaXaa: 0.0 ± 0.0
Cys	0.99CysAla: 0.99 ± 0.011	0.551CysCys: 0.551 ± 0.008	1.228CysAsp: 1.228 ± 0.018	1.159CysGlu: 1.159 ± 0.015	1.016CysPhe: 1.016 ± 0.011	1.223CysGly: 1.223 ± 0.016	0.535CysHis: 0.535 ± 0.008	1.554CysIle: 1.554 ± 0.015	1.543CysLys: 1.543 ± 0.016	2.004CysLeu: 2.004 ± 0.016	0.451CysMet: 0.451 ± 0.006	1.309CysAsn: 1.309 ± 0.014	0.952CysPro: 0.952 ± 0.013	0.783CysGln: 0.783 ± 0.01	1.087CysArg: 1.087 ± 0.012	1.809CysSer: 1.809 ± 0.016	1.252CysThr: 1.252 ± 0.012	1.375CysVal: 1.375 ± 0.014	0.236CysTrp: 0.236 ± 0.005	0.73CysTyr: 0.73 ± 0.009	0.0CysXaa: 0.0 ± 0.0
Asp	2.343AspAla: 2.343 ± 0.017	1.072AspCys: 1.072 ± 0.014	3.928AspAsp: 3.928 ± 0.029	3.948AspGlu: 3.948 ± 0.025	2.476AspPhe: 2.476 ± 0.016	2.802AspGly: 2.802 ± 0.022	1.226AspHis: 1.226 ± 0.011	4.122AspIle: 4.122 ± 0.022	3.407AspLys: 3.407 ± 0.021	4.694AspLeu: 4.694 ± 0.026	1.187AspMet: 1.187 ± 0.012	3.309AspAsn: 3.309 ± 0.021	1.954AspPro: 1.954 ± 0.015	1.784AspGln: 1.784 ± 0.013	2.195AspArg: 2.195 ± 0.018	4.101AspSer: 4.101 ± 0.026	2.811AspThr: 2.811 ± 0.018	3.314AspVal: 3.314 ± 0.021	0.575AspTrp: 0.575 ± 0.009	1.873AspTyr: 1.873 ± 0.015	0.001AspXaa: 0.001 ± 0.0
Glu	2.7GluAla: 2.7 ± 0.022	1.247GluCys: 1.247 ± 0.015	3.312GluAsp: 3.312 ± 0.023	4.448GluGlu: 4.448 ± 0.038	2.448GluPhe: 2.448 ± 0.015	2.022GluGly: 2.022 ± 0.017	1.377GluHis: 1.377 ± 0.012	4.454GluIle: 4.454 ± 0.021	5.016GluLys: 5.016 ± 0.032	5.425GluLeu: 5.425 ± 0.03	1.46GluMet: 1.46 ± 0.013	4.455GluAsn: 4.455 ± 0.028	2.022GluPro: 2.022 ± 0.019	2.281GluGln: 2.281 ± 0.018	2.757GluArg: 2.757 ± 0.023	4.126GluSer: 4.126 ± 0.026	3.358GluThr: 3.358 ± 0.021	3.253GluVal: 3.253 ± 0.018	0.634GluTrp: 0.634 ± 0.008	2.127GluTyr: 2.127 ± 0.016	0.0GluXaa: 0.0 ± 0.0
Phe	1.8PheAla: 1.8 ± 0.012	0.999PheCys: 0.999 ± 0.011	2.441PheAsp: 2.441 ± 0.016	2.503PheGlu: 2.503 ± 0.017	2.202PhePhe: 2.202 ± 0.018	2.271PheGly: 2.271 ± 0.017	1.016PheHis: 1.016 ± 0.011	3.068PheIle: 3.068 ± 0.02	3.306PheLys: 3.306 ± 0.02	4.148PheLeu: 4.148 ± 0.023	0.991PheMet: 0.991 ± 0.01	2.791PheAsn: 2.791 ± 0.018	1.76PhePro: 1.76 ± 0.014	1.643PheGln: 1.643 ± 0.013	1.992PheArg: 1.992 ± 0.018	3.643PheSer: 3.643 ± 0.019	2.364PheThr: 2.364 ± 0.017	2.626PheVal: 2.626 ± 0.017	0.5PheTrp: 0.5 ± 0.006	1.657PheTyr: 1.657 ± 0.014	0.001PheXaa: 0.001 ± 0.0
Gly	2.311GlyAla: 2.311 ± 0.021	1.037GlyCys: 1.037 ± 0.011	2.322GlyAsp: 2.322 ± 0.018	2.269GlyGlu: 2.269 ± 0.019	2.162GlyPhe: 2.162 ± 0.016	3.402GlyGly: 3.402 ± 0.051	1.364GlyHis: 1.364 ± 0.015	3.068GlyIle: 3.068 ± 0.018	3.072GlyLys: 3.072 ± 0.02	3.972GlyLeu: 3.972 ± 0.022	0.957GlyMet: 0.957 ± 0.011	2.456GlyAsn: 2.456 ± 0.017	1.851GlyPro: 1.851 ± 0.023	1.681GlyGln: 1.681 ± 0.016	2.415GlyArg: 2.415 ± 0.019	3.653GlySer: 3.653 ± 0.03	2.545GlyThr: 2.545 ± 0.019	2.795GlyVal: 2.795 ± 0.022	0.533GlyTrp: 0.533 ± 0.008	1.676GlyTyr: 1.676 ± 0.016	0.001GlyXaa: 0.001 ± 0.0
His	0.996HisAla: 0.996 ± 0.011	0.609HisCys: 0.609 ± 0.008	1.083HisAsp: 1.083 ± 0.011	1.209HisGlu: 1.209 ± 0.011	1.305HisPhe: 1.305 ± 0.013	1.14HisGly: 1.14 ± 0.012	1.054HisHis: 1.054 ± 0.021	1.738HisIle: 1.738 ± 0.015	1.621HisLys: 1.621 ± 0.015	2.474HisLeu: 2.474 ± 0.016	0.58HisMet: 0.58 ± 0.008	1.527HisAsn: 1.527 ± 0.013	1.088HisPro: 1.088 ± 0.011	1.129HisGln: 1.129 ± 0.013	1.322HisArg: 1.322 ± 0.012	1.942HisSer: 1.942 ± 0.014	1.426HisThr: 1.426 ± 0.014	1.387HisVal: 1.387 ± 0.013	0.288HisTrp: 0.288 ± 0.005	0.934HisTyr: 0.934 ± 0.01	0.0HisXaa: 0.0 ± 0.0
Ile	3.218IleAla: 3.218 ± 0.02	1.515IleCys: 1.515 ± 0.014	4.126IleAsp: 4.126 ± 0.019	4.471IleGlu: 4.471 ± 0.022	3.11IlePhe: 3.11 ± 0.02	3.042IleGly: 3.042 ± 0.017	1.671IleHis: 1.671 ± 0.015	5.461IleIle: 5.461 ± 0.029	5.792IleLys: 5.792 ± 0.03	6.539IleLeu: 6.539 ± 0.03	1.618IleMet: 1.618 ± 0.013	4.893IleAsn: 4.893 ± 0.028	3.092IlePro: 3.092 ± 0.017	2.822IleGln: 2.822 ± 0.019	3.014IleArg: 3.014 ± 0.019	5.632IleSer: 5.632 ± 0.028	4.184IleThr: 4.184 ± 0.024	4.124IleVal: 4.124 ± 0.02	0.656IleTrp: 0.656 ± 0.008	2.3IleTyr: 2.3 ± 0.016	0.001IleXaa: 0.001 ± 0.0
Lys	3.011LysAla: 3.011 ± 0.022	1.731LysCys: 1.731 ± 0.015	3.371LysAsp: 3.371 ± 0.022	4.384LysGlu: 4.384 ± 0.03	2.997LysPhe: 2.997 ± 0.019	2.49LysGly: 2.49 ± 0.02	1.974LysHis: 1.974 ± 0.014	5.828LysIle: 5.828 ± 0.031	7.244LysLys: 7.244 ± 0.047	7.112LysLeu: 7.112 ± 0.033	1.955LysMet: 1.955 ± 0.014	5.567LysAsn: 5.567 ± 0.033	3.02LysPro: 3.02 ± 0.024	2.895LysGln: 2.895 ± 0.02	3.925LysArg: 3.925 ± 0.019	5.971LysSer: 5.971 ± 0.029	4.768LysThr: 4.768 ± 0.023	3.669LysVal: 3.669 ± 0.019	0.856LysTrp: 0.856 ± 0.01	2.951LysTyr: 2.951 ± 0.023	0.001LysXaa: 0.001 ± 0.0
Leu	4.613LeuAla: 4.613 ± 0.023	2.039LeuCys: 2.039 ± 0.016	4.623LeuAsp: 4.623 ± 0.027	5.401LeuGlu: 5.401 ± 0.037	3.814LeuPhe: 3.814 ± 0.025	3.741LeuGly: 3.741 ± 0.023	2.251LeuHis: 2.251 ± 0.018	5.983LeuIle: 5.983 ± 0.029	7.816LeuLys: 7.816 ± 0.036	8.725LeuLeu: 8.725 ± 0.043	2.176LeuMet: 2.176 ± 0.014	6.116LeuAsn: 6.116 ± 0.028	4.336LeuPro: 4.336 ± 0.026	4.047LeuGln: 4.047 ± 0.025	4.496LeuArg: 4.496 ± 0.025	7.554LeuSer: 7.554 ± 0.033	5.091LeuThr: 5.091 ± 0.024	4.973LeuVal: 4.973 ± 0.028	0.935LeuTrp: 0.935 ± 0.008	3.063LeuTyr: 3.063 ± 0.018	0.002LeuXaa: 0.002 ± 0.0
Met	1.424MetAla: 1.424 ± 0.013	0.581MetCys: 0.581 ± 0.008	1.303MetAsp: 1.303 ± 0.012	1.344MetGlu: 1.344 ± 0.014	1.074MetPhe: 1.074 ± 0.011	0.955MetGly: 0.955 ± 0.01	0.519MetHis: 0.519 ± 0.007	1.443MetIle: 1.443 ± 0.012	1.698MetLys: 1.698 ± 0.013	2.119MetLeu: 2.119 ± 0.014	0.664MetMet: 0.664 ± 0.009	1.418MetAsn: 1.418 ± 0.012	0.959MetPro: 0.959 ± 0.009	0.779MetGln: 0.779 ± 0.01	1.008MetArg: 1.008 ± 0.01	2.048MetSer: 2.048 ± 0.015	1.388MetThr: 1.388 ± 0.012	1.411MetVal: 1.411 ± 0.013	0.246MetTrp: 0.246 ± 0.004	0.9MetTyr: 0.9 ± 0.009	0.0MetXaa: 0.0 ± 0.0
Asn	2.827AsnAla: 2.827 ± 0.017	1.375AsnCys: 1.375 ± 0.013	3.66AsnAsp: 3.66 ± 0.022	4.049AsnGlu: 4.049 ± 0.028	2.793AsnPhe: 2.793 ± 0.018	2.997AsnGly: 2.997 ± 0.022	1.537AsnHis: 1.537 ± 0.012	5.462AsnIle: 5.462 ± 0.031	4.861AsnLys: 4.861 ± 0.027	5.678AsnLeu: 5.678 ± 0.03	1.502AsnMet: 1.502 ± 0.012	5.256AsnAsn: 5.256 ± 0.029	2.221AsnPro: 2.221 ± 0.018	2.345AsnGln: 2.345 ± 0.021	2.775AsnArg: 2.775 ± 0.019	5.174AsnSer: 5.174 ± 0.026	3.734AsnThr: 3.734 ± 0.021	3.815AsnVal: 3.815 ± 0.022	0.685AsnTrp: 0.685 ± 0.01	2.418AsnTyr: 2.418 ± 0.018	0.001AsnXaa: 0.001 ± 0.0
Pro	2.204ProAla: 2.204 ± 0.023	0.766ProCys: 0.766 ± 0.013	2.106ProAsp: 2.106 ± 0.016	2.491ProGlu: 2.491 ± 0.018	1.614ProPhe: 1.614 ± 0.013	1.985ProGly: 1.985 ± 0.03	0.988ProHis: 0.988 ± 0.01	3.058ProIle: 3.058 ± 0.02	2.986ProLys: 2.986 ± 0.018	3.725ProLeu: 3.725 ± 0.022	0.876ProMet: 0.876 ± 0.011	2.634ProAsn: 2.634 ± 0.018	3.091ProPro: 3.091 ± 0.036	1.681ProGln: 1.681 ± 0.021	1.843ProArg: 1.843 ± 0.015	3.788ProSer: 3.788 ± 0.028	2.806ProThr: 2.806 ± 0.019	2.798ProVal: 2.798 ± 0.023	0.469ProTrp: 0.469 ± 0.007	1.453ProTyr: 1.453 ± 0.015	0.001ProXaa: 0.001 ± 0.0
Gln	1.65GlnAla: 1.65 ± 0.014	0.843GlnCys: 0.843 ± 0.011	1.601GlnAsp: 1.601 ± 0.014	2.082GlnGlu: 2.082 ± 0.017	1.715GlnPhe: 1.715 ± 0.014	1.365GlnGly: 1.365 ± 0.013	1.116GlnHis: 1.116 ± 0.013	2.7GlnIle: 2.7 ± 0.019	2.886GlnLys: 2.886 ± 0.02	3.818GlnLeu: 3.818 ± 0.024	0.975GlnMet: 0.975 ± 0.01	2.737GlnAsn: 2.737 ± 0.02	1.806GlnPro: 1.806 ± 0.021	2.938GlnGln: 2.938 ± 0.064	1.868GlnArg: 1.868 ± 0.015	2.965GlnSer: 2.965 ± 0.022	2.276GlnThr: 2.276 ± 0.015	1.984GlnVal: 1.984 ± 0.015	0.451GlnTrp: 0.451 ± 0.007	1.397GlnTyr: 1.397 ± 0.013	0.0GlnXaa: 0.0 ± 0.0
Arg	2.19ArgAla: 2.19 ± 0.017	1.063ArgCys: 1.063 ± 0.011	2.084ArgAsp: 2.084 ± 0.014	2.464ArgGlu: 2.464 ± 0.019	2.088ArgPhe: 2.088 ± 0.017	2.174ArgGly: 2.174 ± 0.019	1.329ArgHis: 1.329 ± 0.012	2.945ArgIle: 2.945 ± 0.018	3.825ArgLys: 3.825 ± 0.021	4.43ArgLeu: 4.43 ± 0.025	1.064ArgMet: 1.064 ± 0.01	2.836ArgAsn: 2.836 ± 0.019	2.189ArgPro: 2.189 ± 0.019	1.94ArgGln: 1.94 ± 0.015	3.378ArgArg: 3.378 ± 0.028	3.751ArgSer: 3.751 ± 0.024	2.621ArgThr: 2.621 ± 0.02	2.586ArgVal: 2.586 ± 0.02	0.693ArgTrp: 0.693 ± 0.009	1.629ArgTyr: 1.629 ± 0.012	0.001ArgXaa: 0.001 ± 0.0
Ser	3.942SerAla: 3.942 ± 0.027	1.583SerCys: 1.583 ± 0.016	4.496SerAsp: 4.496 ± 0.022	4.566SerGlu: 4.566 ± 0.022	3.432SerPhe: 3.432 ± 0.018	3.873SerGly: 3.873 ± 0.026	1.801SerHis: 1.801 ± 0.013	5.711SerIle: 5.711 ± 0.026	5.839SerLys: 5.839 ± 0.029	7.079SerLeu: 7.079 ± 0.03	1.787SerMet: 1.787 ± 0.013	5.381SerAsn: 5.381 ± 0.026	3.651SerPro: 3.651 ± 0.031	2.778SerGln: 2.778 ± 0.018	3.569SerArg: 3.569 ± 0.028	8.327SerSer: 8.327 ± 0.052	5.404SerThr: 5.404 ± 0.03	4.86SerVal: 4.86 ± 0.023	0.79SerTrp: 0.79 ± 0.01	2.69SerTyr: 2.69 ± 0.02	0.001SerXaa: 0.001 ± 0.0
Thr	3.295ThrAla: 3.295 ± 0.021	1.224ThrCys: 1.224 ± 0.015	3.091ThrAsp: 3.091 ± 0.019	3.378ThrGlu: 3.378 ± 0.022	2.519ThrPhe: 2.519 ± 0.018	2.769ThrGly: 2.769 ± 0.021	1.324ThrHis: 1.324 ± 0.013	4.326ThrIle: 4.326 ± 0.026	4.059ThrLys: 4.059 ± 0.024	5.292ThrLeu: 5.292 ± 0.026	1.406ThrMet: 1.406 ± 0.013	3.7ThrAsn: 3.7 ± 0.021	2.791ThrPro: 2.791 ± 0.021	1.991ThrGln: 1.991 ± 0.015	2.477ThrArg: 2.477 ± 0.017	5.159ThrSer: 5.159 ± 0.027	4.248ThrThr: 4.248 ± 0.036	3.818ThrVal: 3.818 ± 0.026	0.603ThrTrp: 0.603 ± 0.008	1.987ThrTyr: 1.987 ± 0.014	0.001ThrXaa: 0.001 ± 0.0
Val	3.226ValAla: 3.226 ± 0.022	1.436ValCys: 1.436 ± 0.014	3.388ValAsp: 3.388 ± 0.018	3.512ValGlu: 3.512 ± 0.02	2.681ValPhe: 2.681 ± 0.018	2.636ValGly: 2.636 ± 0.022	1.49ValHis: 1.49 ± 0.013	3.855ValIle: 3.855 ± 0.021	4.114ValLys: 4.114 ± 0.019	5.471ValLeu: 5.471 ± 0.028	1.324ValMet: 1.324 ± 0.011	3.347ValAsn: 3.347 ± 0.02	2.687ValPro: 2.687 ± 0.019	2.29ValGln: 2.29 ± 0.016	2.636ValArg: 2.636 ± 0.021	4.554ValSer: 4.554 ± 0.023	3.503ValThr: 3.503 ± 0.022	3.986ValVal: 3.986 ± 0.025	0.639ValTrp: 0.639 ± 0.008	2.072ValTyr: 2.072 ± 0.013	0.001ValXaa: 0.001 ± 0.0
Trp	0.502TrpAla: 0.502 ± 0.007	0.308TrpCys: 0.308 ± 0.005	0.521TrpAsp: 0.521 ± 0.008	0.532TrpGlu: 0.532 ± 0.007	0.478TrpPhe: 0.478 ± 0.006	0.436TrpGly: 0.436 ± 0.008	0.237TrpHis: 0.237 ± 0.005	0.707TrpIle: 0.707 ± 0.009	0.941TrpLys: 0.941 ± 0.01	1.102TrpLeu: 1.102 ± 0.012	0.271TrpMet: 0.271 ± 0.005	0.702TrpAsn: 0.702 ± 0.008	0.454TrpPro: 0.454 ± 0.007	0.397TrpGln: 0.397 ± 0.006	0.608TrpArg: 0.608 ± 0.007	0.893TrpSer: 0.893 ± 0.01	0.675TrpThr: 0.675 ± 0.009	0.556TrpVal: 0.556 ± 0.009	0.16TrpTrp: 0.16 ± 0.004	0.381TrpTyr: 0.381 ± 0.007	0.0TrpXaa: 0.0 ± 0.0
Tyr	1.558TyrAla: 1.558 ± 0.013	0.855TyrCys: 0.855 ± 0.01	1.911TyrAsp: 1.911 ± 0.014	1.921TyrGlu: 1.921 ± 0.014	1.775TyrPhe: 1.775 ± 0.014	1.829TyrGly: 1.829 ± 0.018	0.922TyrHis: 0.922 ± 0.01	2.397TyrIle: 2.397 ± 0.017	2.536TyrLys: 2.536 ± 0.019	3.37TyrLeu: 3.37 ± 0.02	0.828TyrMet: 0.828 ± 0.009	2.299TyrAsn: 2.299 ± 0.017	1.438TyrPro: 1.438 ± 0.014	1.309TyrGln: 1.309 ± 0.015	1.694TyrArg: 1.694 ± 0.016	2.777TyrSer: 2.777 ± 0.02	1.987TyrThr: 1.987 ± 0.013	2.0TyrVal: 2.0 ± 0.015	0.429TyrTrp: 0.429 ± 0.008	1.473TyrTyr: 1.473 ± 0.016	0.0TyrXaa: 0.0 ± 0.0
Xaa	0.001XaaAla: 0.001 ± 0.0	0.0XaaCys: 0.0 ± 0.0	0.001XaaAsp: 0.001 ± 0.0	0.0XaaGlu: 0.0 ± 0.0	0.001XaaPhe: 0.001 ± 0.0	0.0XaaGly: 0.0 ± 0.0	0.0XaaHis: 0.0 ± 0.0	0.001XaaIle: 0.001 ± 0.0	0.0XaaLys: 0.0 ± 0.0	0.001XaaLeu: 0.001 ± 0.0	0.0XaaMet: 0.0 ± 0.0	0.001XaaAsn: 0.001 ± 0.0	0.0XaaPro: 0.0 ± 0.0	0.0XaaGln: 0.0 ± 0.0	0.0XaaArg: 0.0 ± 0.0	0.001XaaSer: 0.001 ± 0.0	0.001XaaThr: 0.001 ± 0.0	0.001XaaVal: 0.001 ± 0.0	0.0XaaTrp: 0.0 ± 0.0	0.001XaaTyr: 0.001 ± 0.0	0.018XaaXaa: 0.018 ± 0.005

Statistics based on 31792 proteins (10276363 amino acids)

Note: The error has been estimated with the bootstraping (x100) at the protein level

Above dipeptide statistics (among other stats for this proteome) you can download from this CSV file

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

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