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Biology LibreTexts

B4. O-linked Glycoproteins

The CHOs are usually attached from a Gal (b 1-3) GalNAc to a Ser or Thr of a protein.

Figure: O-linked Glycoproteins

The blood group antigens (CHOs on cells attached to either proteins or lipids) are examples . The sugars shown as chairs in the figure below are the blood group antigens (in contrast to structures found in many texts).  They are attached to a core heterosaccharide (shown as red elipse below) which is connected to either a membrane glycoprotein or glycolipid.

Figure: Blood Group Antigens