Which of the following amino acids in a protein commonly acts as a potential O-Glycosylation site for attachment of an oligosaccharide unit -
O-glycosylation:- Addition of oligosaccharide to hydroxyl chain of serine or threonine.
N-glycosylation:- Addition of oligosaccharide to the amide nitrogen of asparagine.
Glutamine
Cysteine
Serine
Asparagine