"Bitter receptors" refer to special proteins on our taste buds that allow us to taste the bitterness in certain foods and drinks. They help us to detect and recognize the bitter taste. Full definition
This could be explained by their perception of bitter, which differs from that of other mammals due to variations in their repertoire of bitter receptors. (sciencedaily.com)
He found more than 30 that code for bitter receptors but only a single receptor devoted to sweet. (discovermagazine.com)
In the study, the researchers first examined DNA from domestic cats and identified 12 different genes for cat bitter receptors. (sciencedaily.com)