Human Epidermal Growth Factor (EGF) is a polypeptide growth factor which stimulates the proliferation of a wide range of epidermal and epithelial cells. Human Epidermal Growth Factor (EGF) is a 6,200 Da protein containing 53 amino acid residues. Synonym: rHuEGF, Epidermal Growth Facto. Formulation: The protein was lyophilized after extensive dialysis against 10mM Phosphate buffer, pH7.0, 200mM NaCl buffer.