Glycoprotein - N-glycosylation and O-glycosylation

N-glycosylation and O-glycosylation

There are two types of glycoproteins:

• In N-glycosylation (see on the right), the addition of sugar chains can happen at the amide nitrogen on the side-chain of the asparagine.
• In O-glycosylation, the addition of sugar chains can happen on the hydroxyl oxygen on the side-chain of hydroxylysine, hydroxyproline, serine, or threonine.