A functional receptor is NTCP.
His organic eye stung, and the olfactory receptors, still functional in his nostrils, screamed against the potent reek of acrid aromatic esters.
This protein has been identified as a functional receptor for sphingosine 1-phosphate and likely contributes to the regulation of angiogenesis and vascular endothelial cell function.
Additionally, there is functional receptor for NT-4/5 in facial motor neurons that can be serviceable thought embryonic development and even postnatal life.
The majority of these human sequences are pseudogenes but an apparently functional receptor has been identified that is expressed in the human olfactory system.
MHC class I proteins form a functional receptor on most nucleated cells of the body.
The argument can be made that these OR genes could encode functional receptors.
Expression of the two subunits together leads to plasma membrane expression of functional receptor.
Dogs that lack a functional receptor for orexin have narcolepsy, while animals and people lacking the orexin neuropeptide itself also have narcolepsy.
The functional receptor is a heterodimer, composed of type 1 and type 2 receptors.