Table 5.
Key Glycan Structures found in Mucins.
| Type of Glycan | Structure |
|---|---|
| Blood group H type 1  (Galβ1-3GlcNAc) |
 Fucα1-2Galβ1-3GlcNAcβ1- |
| Blood group A type 2  (Galβ1-4GlcNAc) |
 GalNAcα1-3Galβ1-4GlcNAcβ1- | α1-2 Fuc |
| Blood group B type 1  (Galβ1-3GlcNAc) |
 Galα1-3Galβ1-3GlcNAcβ1- | α1-2 Fuc |
| Lewisa and Lewisx |
 Galα1-3GlcNAcβ1- | α1-4 Fuc  Galβ1-4GlcNAcβ1- | α1-3 Fuc |
| Lewisb |
 Galβ1-3GlcNAcβ1- | α1-2 | α1-4 Fuc Fuc |
| Lewisy |
 Galβ1-4GlcNAcβ1- | α1-2 | α1-3 Fuc Fuc |
| Sialyl Lewisa and Sialyl Lewisx |
 Neu5Acα2-3Galβ1-3GlcNAcβ1- | α1-4 Fuc  Neu5Acα2-3Galβ1-4GlcNAcβ1- | α1-3 Fuc |
| Sialyl-Tn |
 Neu5Acα2-6GalNAc-α-O-Ser/Thr |
| Monosialylated-T-antigen |
 Neu5Acα2-3Galβ1-3GalNAc-α-O-Ser/Thr  Neu5Ac | α2-6 Galβ1-3GalNAc-α-O-Ser/Thr |
| Monosialylated core 3 |
 Neu5Ac | α2-6 Galβ1-4GlcNAcβ1-3 GalNAc |
| Sda antigen Type 1 & 2 chains |
 Neu5Ac | α2-3 GalNAcβ1-4Galβ1-3GlcNAcαβ1-3GalNAc  Neu5Ac | α2-3 GalNAcβ1-4Galβ1-4GlcNAcαβ1-3GalNAc- |
Some examples of important glycan structures commonly found in mucin glycans are shown.