Figs 3.

At top are all atom representations, from left to right, of the β subunits of follicle stimulating hormone (FSH), the luteinizing hormone model (LH), and human chorionic gonadotropin hormone (CG). In (b), in the same order, the hormone subunits are presented with electrostatic surfaces. The hormone β subunits of FSH and CG have the “seatbelt polypeptide” as found in the native structure, while in LH, the proteolytically cleaved “seatbelt polypeptide”, seen in the upper left, is held to the core of the subunit only by a disulfide bond.