Table 3.

Identified product ions LC-ESI-QqTOF-MS/MS analysis of the glycated peptide VGYNAPGIPLYK*K (Lys 378) at m/z 1056.8600 (+3)

Production	Calculated m/z	Observed m/z	Deviation (Da)
${\mathrm{Y}}_1^{+}$	1919.0155	1918.8827	−0.1328
[y3−B2]+	1678.8036	1678.5926	−0.2110
${\mathrm{Y}}_0^{+}$	1671.9099	1671.8412	−0.0687
[y12−B6]+	1572.8410	1572.8264	−0.0146
[b12−B6]+	1525.8049	1525.6882	−0.1167
[y2-B2]+	1515.7400	1515.7789	0.0389
[y7−B5]+	1414.7817	1414.6484	−0.1333
[y5−B4]+	1394.7290	1395.4213	0.6923
[y10−B6]+	1352.7562	1352.6128	−0.1434
[y9 − b6]+	1238.7132	1238.5317	−0.1815
[ys−B6]+	1167.6761	1167.6173	−0.0588
[y5−B5]+	1147.6234	1147.5979	−0.0255
[y7 − B6]+	1070.6234	1070.6128	−0.0106
[y2 − B4]+	1021.5289	1021.5341	0.0052
[y6 − B6]+	1013.6019	1013.5967	−0.0052
[y5 − b6]+	900.5178	900.4948	−0.0230
${\mathrm{Y}}_0^{2+}$	836.4589	836.4098	−0.0491
[y4−B6]+	803.4651	804.0202	0.5551
${\mathrm{b}}_8^{+}$	772.3994	772.4025	0.0031
[y3−B6]+	690.3810	690.3774	−0.0036
${\mathrm{b}}_7^{+}$	659.3153	659.3617	0.0464
[y2 − B6]+	527.3177	527.3047	−0.0130
${\mathrm{B}}_2^{+}$	509.2347	509.2240	−0.0107
${\mathrm{b}}_5^{+}$	505.2411	505.2137	−0.0274
[B3−B1]+	495.2184	495.2060	−0.0124
[B3 − B1 − H2O]+	477.2079	477.1967	−0.0112
${\mathrm{C}}_{17}{\mathrm{H}}_{26}{\mathrm{N}}_3{\mathrm{O}}_4^{+}$	336.1918	336.1852	−0.0066
${\mathrm{B}}_1^{+}$	262.1285	262.1181	−0.0104
[B2−B1]+	248.1129	248.1006	−0.0123
[B, − H2O]+	244.1179	244.1063	−0.0116
[B1−CH3OH]+	230.1023	230.0915	−0.0108
${\mathrm{b}}_2^{+}$	157.0977	156.0629	−1.0348
[B1−C4H6O3−H2O]+	142.0863	142.0774	−0.0089