C. elegans growth factor genes and their receptors

after Ruvkun and Hobert, Science December 11, 1998

TGF beta pathway
TGF beta ligands	4
TGF beta receptors	3
Smad adaptor proteins	6
Wingless/Wnt pathway
Wnt-like ligands	5
Frizzled-like receptors	4
Components of the signal transduction pathway	11
lin-12/Notch/EGF signalling pathway
lag-2 type ligands	4
lin-12 type ligands	2
Components of the signal transduction pathway	11
Receptor tyrosine signalling pathway
Receptors	28
Components of the signal transduction pathway	21
Cytoplasmic tyrosine kinases	22 (Src, Abl, Fak and 19 Fes/Fer)
Toll signalling pathway components	1 (there is no orthologue of the Toll receptor)
Hedgehog signalling pathway components	4 (there is no HH ligand)