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. ligands 193,460 5,999 6 8,190 0 986 468 209,109
Average no. ligands/GPCR 612 400 0 372 0 90 19 400
No. GPCRs with ligand (%) 236 (75) 15 (100) 5 (15) 12 (55) 0 (0) 8 (73) 25 (100) 301 (58)
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+