Table 4. Glycopeptides, carbohydrates, and phosphopeptides used in the study. [Reproduced from ref. 14 with Copyright permission of American Chemical Society.].

No.	Name	[M+H]+ (m/z, Ave.)	Structure
Glycopeptides
Sialoglycopeptides
1	Transferrin GP1	3683.7
2	Transferrin GP2	4723.8
3	Fetuin GP1	4605.6
4	Fetuin GP2	3949.0
5	Fetuin GP3	6537.7
Asialoglycopeptides
6	Asialotransferrin GP1	3102.7
7	Asialotransferrin GP2	4142.8
8	Asialofetuin GP1	3733.6
9	Asialofetuin GP2	3367.0
10	Asialofetuin GP3	5664.7
Carbohydrates
Sialoglycans
11	A1 glycan	2010.7
12	A2 glycan	2301.8
Neutral glycans
13	NA2 glycan	1719.6
14	NA4 glycan	2449.8
Phosphopeptides
15	β-Casein 33–48	2061.8	FQ-pS-EEQQQTEDELQDK
16	β-Casein 1–25	3122.3	RELEELNVPGEIVE-pS-L-pS-pS-pS-EESITR

, N-acetylglucosamine: GlcNAc; , galactose; , mannose; , N-acetyl-neuraminic acid: NANA; PA, aminopyridine.