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 198,810 6,165 6 8,283 0 1,019 548
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:

Circle colors indicate a number of ligands:
< 100
< 500
< 1000
1000+

Class A
(Rhodopsin)




Class A
Orphans

Class B1
(Secretin)

Class B2
(Adhesion)




Class C
(Glutamate)

Class F
(Frizzled)

Class T
(Taste 2)