Dipeptide Masses

This table lists dipeptide masses (sum of residue masses + 1Da).
The values are useful for assigning internal fragment-ions and the b2 ion in tandem mass spectra.

										Leu/			Gln/				Met-			Cys-		Cys-
			Gly	Ala	Ser	Pro	Val	Thr	Cys	Ile	Asn	Asp	Lys	Glu	Met	His	ox	Phe	Arg	cm	Tyr	am	Trp
			G	A	S	P	V	T	C	L/I	N	D	Q/K	E	M	H	M-ox	F	R	C-cm	Y	C-am	W
			57	71	87	97	99	101	103	113	114	115	128	129	131	137	147	147	156	161	163	174	186
Gly	G	57	115
Ala	A	71	129	143
Ser	S	87	145	159	175
Pro	P	97	155	169	185	195
Val	V	99	157	171	187	197	199
Thr	T	101	159	173	189	199	201	203
Cys	C	103	161	175	191	201	203	205	207
Leu/Ile	L/I	113	171	185	201	211	213	215	217	227
Asn	N	114	172	186	202	212	214	216	218	228	229
Asp	D	115	173	187	203	213	215	217	219	229	230	231
Gln/Lys	Q/K	128	186	200	216	226	228	230	232	242	243	244	257
Glu	E	129	187	201	217	227	229	231	233	243	244	245	258	259
Met	M	131	189	203	219	229	231	233	235	245	246	247	260	261	263
His	H	137	195	209	225	235	237	239	241	251	252	253	266	267	269	275
Met-ox	M-ox	147	205	219	235	245	247	249	251	261	262	263	276	277	279	285	295
Phe	F	147	205	219	235	245	247	249	251	261	262	263	276	277	279	285	295	295
Arg	R	156	214	228	244	254	256	258	260	270	271	272	285	286	288	294	304	304	313
Cys-cm	C-cm	161	219	233	249	259	261	263	265	275	276	277	290	291	293	299	309	309	318	323
Tyr	Y	163	221	235	251	261	263	265	267	277	278	279	292	293	295	301	311	311	320	325	327
Cys-am	C-am	174	232	246	262	272	274	276	278	288	289	290	303	304	306	312	322	322	331	336	338	349
Trp	W	186	244	258	274	284	286	288	290	300	301	302	315	316	318	324	334	334	343	348	350	361	373

			Gly	Ala	Ser	Pro	Val	Thr	Cys	Leu/Ile	Asn	Asp	Gln	Lys	Glu	Met	His	Met-ox	Phe	Arg	Cys-cm	Tyr	Cys-am	Trp
			G	A	S	P	V	T	C	L/I	N	D	Q	K	E	M	H	M-ox	F	R	C-cm	Y	C-am	W
			57.02146	71.03711	87.03203	97.11670	99.06841	101.04768	103.00919	113.08406	114.04293	115.02694	128.05858	128.09496	129.04259	131.04049	137.05891	147.03541	147.06841	156.10111	161.01467	163.06333	174.04630	186.07931
Gly	G	57.02146	115.05020
Ala	A	71.03711	129.06585	143.08150
Ser	S	87.03203	145.06077	159.07642	175.07134
Pro	P	97.11670	155.14544	169.16109	185.15601	195.24068
Val	V	99.06841	157.09715	171.11280	187.10772	197.19239	199.14410
Thr	T	101.04768	159.07642	173.09207	189.08699	199.17166	201.12337	203.10264
Cys	C	103.00919	161.03793	175.05358	191.04850	201.13317	203.08488	205.06415	207.02566
Leu/Ile	L/I	113.08406	171.11280	185.12845	201.12337	211.20804	213.15975	215.13902	217.10053	227.17540
Asn	N	114.04293	172.07167	186.08732	202.08224	212.16691	214.11862	216.09789	218.05940	228.13427	229.09314
Asp	D	115.02694	173.05568	187.07133	203.06625	213.15092	215.10263	217.08190	219.04341	229.11828	230.07715	231.06116
Gln	Q	128.05858	186.08732	200.10297	216.09789	226.18256	228.13427	230.11354	232.07505	242.14992	243.10879	244.09280	257.12444
Lys	K	128.09496	186.12370	200.13935	216.13427	226.21894	228.17065	230.14992	232.11143	242.18630	243.14517	244.12918	257.16082	257.19720
Glu	E	129.04259	187.07133	201.08698	217.08190	227.16657	229.11828	231.09755	233.05906	243.13393	244.09280	245.07681	258.10845	258.14483	259.09246
Met	M	131.04049	189.06923	203.08488	219.07980	229.16447	231.11618	233.09545	235.05696	245.13183	246.09070	247.07471	260.10635	260.14273	261.09036	263.08826
His	H	137.05891	195.08765	209.10330	225.09822	235.18289	237.13460	239.11387	241.07538	251.15025	252.10912	253.09313	266.12477	266.16115	267.10878	269.10668	275.12510
Met-ox	M-ox	147.03541	205.06415	219.07980	235.07472	245.15939	247.11110	249.09037	251.05188	261.12675	262.08562	263.06963	276.10127	276.13765	277.08528	279.08318	285.10160	295.07810
Phe	F	147.06841	205.09715	219.11280	235.10772	245.19239	247.14410	249.12337	251.08488	261.15975	262.11862	263.10263	276.13427	276.17065	277.11828	279.11618	285.13460	295.11110	295.14410
Arg	R	156.10111	214.12985	228.14550	244.14042	254.22509	256.17680	258.15607	260.11758	270.19245	271.15132	272.13533	285.16697	285.20335	286.15098	288.14888	294.16730	304.14380	304.17680	313.20950
Cys-cm	C-cm	161.01467	219.04341	233.05906	249.05398	259.13865	261.09036	263.06963	265.03114	275.10601	276.06488	277.04889	290.08053	290.11691	291.06454	293.06244	299.08086	309.05736	309.09036	318.12306	323.03662
Tyr	Y	163.06333	221.09207	235.10772	251.10264	261.18731	263.13902	265.11829	267.07980	277.15467	278.11354	279.09755	292.12919	292.16557	293.11320	295.11110	301.12952	311.10602	311.13902	320.17172	325.08528	327.13394
Cys-am	C-am	174.04630	232.07504	246.09069	262.08561	272.17028	274.12199	276.10126	278.06277	288.13764	289.09651	290.08052	303.11216	303.14854	304.09617	306.09407	312.11249	322.08899	322.12199	331.15469	336.06825	338.11691	349.09988
Trp	W	186.07931	244.10805	258.12370	274.11862	284.20329	286.15500	288.13427	290.09578	300.17065	301.12952	302.11353	315.14517	315.18155	316.12918	318.12708	324.14550	334.12200	334.15500	343.18770	348.10126	350.14992	361.13289	373.16590

Note: C-cm; carboxy-methyl Cys | C-am; acrylamide-modified Cys | M-ox; oxidized Met

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