It is composed of two subunits, alpha-ovomucin (MUC5B) and beta-ovomucin (MUC6), of which the beta subunit is much more heavily glycosylated.
The mucin is comprised of two subcomponents, alpha-ovomucin (MUC5B) and beta-ovomucin (MUC6), where the beta subunit has a significantly higher level of glycosylation.