Indicate whether each of the following descriptions better applies to N-linked (N) or O-linked (O) glycosylation. Your answer would be a four-letter string composed of letters N and O only, e.g. OONO.
( ) It is abundant in proteoglycans.
( ) It involves the attachment of a preassembled block of oligosaccharide onto a protein.
( ) It is attached to a serine or threonine residue in the protein.
( ) It involves heavily sulfated sugars.

Question

Indicate whether each of the following descriptions better applies to N-linked (N) or O-linked (O) glycosylation. Your answer would be a four-letter string composed of letters N and O only, e.g. OONO.
( )	It is abundant in proteoglycans.
( )	It involves the attachment of a preassembled block of oligosaccharide onto a protein.
( )	It is attached to a serine or threonine residue in the protein.
( )	It involves heavily sulfated sugars.

Quizplus · Accepted Answer

In N-linked glycosylation, a preassembled block of oligosaccharide is attached onto an asparagine side chain in the protein. O-linked glycosylation, in which sugars are added to the hydroxyl groups in the side chains of serine, threonine, or other residues, often involves sulfated sugars and is responsible for the production of heavily-glycosylation in proteoglycans.

Indicate Whether Each of the Following Descriptions Better Applies to N-Linked