How do we smell? The answer lies in the 1,000 or so genes that encode what's known as olfactory receptors inside our noses.
This gene superfamily constitutes 3 to 6 percent of a mammal's genes.
But scientists don't completely understand what odors bind to which receptors, and how this complex process translates into interpreting a particular smell.
In fact, little is known about how olfactory receptors function in mammals, or how this large gene family has evolved in ...