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 190,799 5,832 0 8,066 0 972 466 206,135
Average no. ligands/GPCR 651 389 0 367 0 88 19 411
No. GPCRs with ligand (%) 209 (71) 14 (93) 0 (0) 11 (50) 0 (0) 4 (36) 25 (100) 263 (52)
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+