EGF is a potent growth factor that stimulates the proliferation of various epidermal and epithelial cells. Additionally, EGF has been shown to inhibit gastric secretion, and to be involved in wound healing. EGF signals through a receptor known as c-erbB, which is a class I tyrosine kinase receptor. This receptor also binds with TGF-α and VGF (vaccinia virus growth factor). Recombinant human EGF is a 6,2 kDa globular protein containing 53 amino acid residues including 3 intramolecular disulfide-bonds.
The specific activity ED₅₀ was determined by a cell proliferation assay using balb/c 3T3 cells is ≤0,1 ng/ml, corresponding to a specific activity of ≥1×10⁷ units/mg.