Ovalbumin (low endotoxin) is the predominant protein found in egg whites and exhibits various biological activities, including anti-cancer, antihypertensive, antibacterial, antioxidant, and immunomodulatory properties. Ovalbumin (low endotoxin) are synthesized as the most abundant protein in oviducts treated with progesterone or estrogen, and they are commonly used as markers in studies of hormone regulation on gene expression in tissues.