Number of unique ligands per receptor class

Class
(Family)		 A (Rhodopsin) B1 (Secretin) B2 (Adhesion) C (Glutamate) D1
(Ste2-like fungal pheromone) 		F (Frizzled) T2 (Taste 2)
Total
No. biased ligands 200,478 6,188 6 8,306 0 1,020 580
No. GPCRs with ligand 240 15 5 13 0 8 25
Specific sets of ligands can be downloaded from the ligand browser.


Ligand coverage of GPCR classes


Receptor names:
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    		< 100
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    		1000+