In molecular biology,<unk> rins and<unk> s are components of cell signaling pathways involved in animal development, and implicated in some cancers.<unk> s are classified as<unk>  tyrosine kinases (RTKs), and form the largest sub-family of RTKs.
Eph receptor
G protein
Janus kinase
Receptor tyrosine kinase
Tumor necrosis factor receptor
Trk receptor
Rho GTPase
GTPase activating protein