Receptor tyrosine kinases (RTK)s are very important signaling pathway, which not only include growth factor receptors such as EGFR(HER), VEGFR, PDGFR, FGFR, IGF-1R, Mast/stem cell growth factor receptor (c-Met) and HER2, but also other gene products which are expressed by the oncogenes such as SRC, Bcr, c-Met and Abl as well.
Receptor Tyrosine Kinase animation. Binding of insulin ligand will cause monomers to become dimers. Then, the (many) tyrosine(s) will auto-phosphorylate. This creates another conformational change that allows it to interact with an "adapter protein" which then indirectly binds with a G-protein. The tyrosine kinase can lead to multiple cellular responses from just ONE signal.