Figure 2.

Functions of specific Asn-linked oligosaccharides in FSH. Polypeptide moiety of FSH extracted from pdb file 1ay9 and the heterodimer rendered as cartoon using PyMol. The subunits are colored as in Fig. 1 (yellow indicates cystine knot loops L1 and L3, cyan indicates the seatbelt loop, green indicates remaining FSHα and FSHβ). Oligosaccharides are rendered as sticks colored green for αAsn⁵² and αAsn⁷⁸, cyan for βAsn⁷ and βAsn²⁴.