The epidermal growth factor receptor (EGFR) is a transmembrane protein. The dimerization of EGFR stimulates the activity of intracellular protein tyrosine kinase. Therefore, several tyrosine (y) residues in the C-terminal domain of EGFR undergo autophosphorylation. These include y992, y1045, y1068, y1148, and y1173, as shown in the adjacent chart....