Fig. 3.

The α subunit in red, common to all of the GPHs, was placed by superimposing human chorionic gonadotropin (1HCN) upon a β subunit of luteinizing hormone using only β subunit amino acids 5 through 100, and the β subunit of hCG then erased. Thus, the image represents a model of the LH hormone, assuming the α and β subunit orientations are the same as in hCG, for which there is evidence (Jiang et al., 2014).