One of the first examples of an olfactory receptor found outside the nose showed that human sperm express an olfactory receptor, and that sperm with this receptor will seek out the chemical that the receptor responds to -- the receptor's ligand.
Jedan od prvih primjera olfaktornog receptora pronađenog izvan nosa, pokazao je da ljudska sperma ima olfaktorni receptor i da će sperma ovim receptorom tražiti kemikaliju kojoj taj receptor odgovara -- receptorov ligand.