Table 2.

List of N‐linked glycan structures from IgG heavy chains, as determined by MALDI‐TOF (time of flight) mass spectrometric analysis (Fig. 2)

No.	Mol. Mass	Assigned composition	Relative amount (mean ± SD)
			Cancer	Benign	Normal
1	1689.8237	(HexNAc)1(Deoxyhexose)1 + (Man)3(GlcNAc)2	0.05 ± 0.06	0.00 ± 0.00	0.06 ± 0.08
2	1746.7541	(HexNAc)2 + (Man)3(GlcNAc)2	0.16 ± 0.17	0.27 ± 0.23	0.09 ± 0.11
3	1851.8935	(Hex)1(HexNAc)1(Deoxyhexose)1 + (Man)3(GlcNAc)2	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00
4	1892.8917	(HexNAc)2(Deoxyhexose)1 + (Man)3(GlcNAc)2	38.23 ± 7.89	34.01 ± 3.36	27.37 ± 1.84
5	1908.8931	(Hex)1(HexNAc)2 + (Man)3(GlcNAc)2	0.39 ± 0.13	0.58 ± 0.42	0.12 ± 0.12
6	2054.9466	(Hex)1(HexNAc)2(Deoxyhexose)1 + (Man)3(GlcNAc)2	48.47 ± 2.71	53.33 ± 1.54	53.03 ± 3.00
7	2070.9392	(Hex)2(HexNAc)2 + (Man)3(GlcNAc)2	0.13 ± 0.18	0.16 ± 0.18	0.10 ± 0.08
8	2095.9783	(HexNAc)3(Deoxyhexose)1 + (Man)3(GlcNAc)2	1.48 ± 0.67	1.53 ± 0.54	1.60 ± 0.77
9	2216.9994	(Hex)2(HexNAc)2(Deoxyhexose)1 + (Man)3(GlcNAc)2	6.16 ± 1.74	6.95 ± 2.17	11.27 ± 2.79
10	2258.0164	(Hex)1(HexNAc)3(Deoxyhexose)1 + (Man)3(GlcNAc)2	1.05 ± 0.17	1.42 ± 0.54	1.24 ± 0.46
11	2360.0530	(Hex)1(HexNAc)2(Deoxyhexose)1(NeuAc)1 + (Man)3(GlcNAc)2	0.23 ± 0.00	0.19 ± 0.09	0.27 ± 0.19
12	2522.0977	(Hex)2(HexNAc)2(Deoxyhexose)1(NeuAc)1 + (Man)3(GlcNAc)2	1.09 ± 0.41	0.94 ± 0.43	2.08 ± 0.98
13	2828.2742	(Hex)2(HexNAc)2(Deoxyhexose)1(NeuAc)2 + (Man)3(GlcNAc)2	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00

GlcNAc: N‐acetylglucosamine; Man: mannose; Neu5Ac: N‐acetylneuraminic acid; GalNAc: N‐acetylgalactosamine; HexNAc, N‐acetylhexosamine.