Figure 1.

Structure of the N-glycan. The N-glycan structure consists of 14 carbohydrate residues. It contains two N-acetylglucosamines (GlcNAc, black squares), nine mannoses (Man, gray circles), and three glucoses (Glc, black circles). Linkage information is indicated between carbohydrate residues. The different residues are labeled with the genes encoding the glycosyltransferase that catalyzes the transfer of the respective residue. The structure of the glycan has three branches labeled a, b, and c.