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Table 2 Detected glycan compositions of the TPLPPTSAHGNVAEGETKPDPVTER O-glycopeptides in tryptic digest of hemopexin isolated from pooled plasma of disease-free controls, cirrhotic, and HCC patients

From: Increased sialylation of site specific O-glycoforms of hemopexin in liver disease

m/z

Delta (ppm)

Glycan composition

XIC (%)

973.5 (3+)

9.55

HexNAc

0.35

770.9 (4+)

2.08

HexNAc-Gal

1.74

843.6 (4+)

3.20

HexNAc-Gal-Neu5Ac

66.19

916.4 (4+)

3.38

HexNAc-Gal-2Neu5Ac

19.61

894.4 (4+)

−0.67

2HexNAc-Gal-Neu5Ac

0.16

934.9 (4+)

3.85

2HexNAc-2Gal-Neu5Ac

0.38

1007.7 (4+)

3.27

2HexNAc-2Gal-2Neu5Ac

7.22

1080.5 (4+)

4.54

2HexNAc-2Gal-3Neu5Ac

1.62

1153.2 (4+)

5.81

2HexNAc-2Gal-4Neu5Ac

0.68

1058.5 (4+)

−5.29

3HexNAc-2Gal-2Neu5Ac

0.09

1099.0 (4+)

6.10

3HexNAc-3Gal-2Neu5Ac

0.15

937.6 (5+)

3.73

3HexNAc-3Gal-3Neu5Ac

1.23

995.8 (5+)

0.40

3HexNAc-3Gal-4Neu5Ac

0.45

1054.0 (5+)

1.99

3HexNAc-3Gal-5Neu5Ac

0.08

1112.3 (5+)

11.60

3HexNAc-3Gal-6Neu5Ac

0.04

  1. Relative abundance is estimated as percent XIC signal of each glycopeptide (m/z) normalized to the sum of all O-glycopeptides