Ovomucoid is, together with Conalbumin (Ovotransferrin), the major allergenic protein in Hen’s egg. The highest concentration is found in Egg white. Ovomucoid is a unique Egg protein and is the dominant allergen in Hen’s egg, even though Ovomucoid comprises only 10% of total Egg white protein and Ovalbumin comprises >50% (25,52).