The Mucins are a family of highly glycosylated, secreted proteins with a basic structure consisting of a variable number of tandem repeats. Mucin-3/MUC3 is a major glycoprotein component of a variety of mucus gels. Thought to provide a protective, lubricating barrier against particles and infectious agents at mucosal surfaces. May be involved in ligand binding and intracellular signaling. [UniProt]
