- Docking protein FRS2 links the protein tyrosine kinase RET and its oncogenic forms with the mitogen-activated protein kinase signaling cascade. Melillo, R.M., Santoro, M., Ong, S.H., Billaud, M., Fusco, A., Hadari, Y.R., Schlessinger, J., Lax, I. Mol. Cell. Biol. (2001)