Table 4. Proposed structures and their molecular ions in MALDI spectra of O-linked glycans in the four cell lines.

No.	Calculated m/z	Relative intensity				Glycan Structure	Type
		GES-1	SGC-7901	HGC-27	MGC-803
1	512.307	0.1869±0.0011	0.1799±0.0014	0.0553±0.0001	0.0680±0.0002		core 1
2	575.315		0.2947±0.0010				core 3,5
3	600.23	0.0813±0.0005		0.2438±0.0012	0.1167±0.0004		core 1
4	779.415	0.1401±0.0003	0.1502±0.0006				core 1,2,3
5	798.459				0.0351±0.0002		core 4,5
6	820.441	0.0717±0.0003		0.0396±0.0001	0.0641±0.0003		core 4,5
7	983.515	0.0789±0.0002	0.0848±0.0005	0.1347±0.0007	0.1031±0.0006		core 1,2,6
8	1024.541	0.0258		0.0308±0.0001	0.0325±0.0002		core 2,4,6
9	1069.551				0.0186±0.0001		core 1
10	1247.986		0.0122	0.0309±0.0003	0.0203±0.0001		core 2
11	1380.748		0.0082±0.0001				Core 1,2,3,4
12	1383.711			0.0102	0.0073		core 8
13	1397.634	0.0220±0.0001	0.0231±0.0001	0.0286±0.0001	0.0306±0.0001		core 2
14	1402.73		0.0282±0.0002		0.0202±0.0001		core 1,2,3
15	1421.775				0.0145±0.0001		core 2,4
16	1584.848	0.0069		0.0105			core 1,2
17	1587.811			0.0150±0.0001	0.0097		core 8
18	1601.74	0.1004±0.0002	0.0348±0.0002	0.1524±0.0005	0.0819±0.0003		core 2
19	1606.83		0.0059	0.0118	0.0113		core 1,2
20	1614.859	0.0071					core 1,5
21	1758.937	0.0210±0.0001	0.0234±0.0001	0.0408±0.0001	0.0333±0.0001		core 1
22	1777.932		0.0061				core 2
23	1788.948	0.0106	0.0108±0.0001	0.0209±0.0001	0.0099		core 1
24	1791.911	0.0213±0.0001	0.0161±0.0001		0.0144±0.0001		core 8
25	1834.941	0.0296±0.0001	0.0136±0.0001	0.0370±0.0001	0.0275±0.0001		core 2,3
26	1857.969			0.0132			core 1,2
27	1963.037	0.0077	0.0127		0.0155		core 1
28	1996.035	0.0137±0.0001	0.0122±0.0001	0.0105	0.0143		core 2,4
29	2009.03	0.1310±0.0006	0.1006±0.000	0.0752±0.0003	0.1404±0.0004		core 2
30	2039.041	0.0177±0.0001		0.0103	0.0140		core 2
31	2167.137	0.0259±0.0002	0.0215±0.0001	0.0187±0.0001	0.0291±0.0001		core 1,2
32	2199.047	0.0279±0.0001		0.0.45±0.0001	0.0208±0.0001		core 2
33	2243.14	0.0421±0.000	0.0177±0.0001	0.0233±0.0001	0.0298±0.0001		core 1
34	2370.204			0.0082	0.0076		core 3
35	2417.23	0.0841±0.0007	0.0434±0.0001	0.0648±0.0003	0.0764±0.0002		core 2
36	2249.16			0.0094	0.0085		core 2