Epidermal growth factor receptor encoded by EGFR is a transmembrane glycoprotein that is a member of the protein kinase superfamily. Epidermal growth factor receptor is a receptor for members of the epidermal growth factor family. EGFR is a cell surface protein that binds to epidermal growth factor. Binding of tepidermal growth factor receptor to a ligand induces receptor dimerization and tyrosine autophosphorylation and leads to cell proliferation. Mutations in EGFR are associated with lung cancer.