G Protein-coupled receptors

 Ion channels

 Nuclear receptors

 Protein kinases

 Cytokines and receptors

   Cytokines

     Interleukins

     Interferons

     CSF and other factors

     Chemokines

     Tumor necrosis factors

     Transforming growth factors (RSTK-binding)

       TGFB [HSA:7040 7042 7043] [KO:K13375 K13376 K13377]

       TGFB1 [HSA:7040] [KO:K13375]

       TGFB2 [HSA:7042] [KO:K13376]

       MSTN [HSA:2660] [KO:K05497]

       GDF15 [HSA:9518] [KO:K05504]

     Growth factors (RTK-binding)

   Cytokine receptors

   Pattern recognition receptors

 Cell surface molecules and ligands

 Transporters

 Enzymes

 Nucleic acids

 Not elsewhere classified