Mucin

Mucins are a diverse family of densely glycosylated proteins. Mucin domains within the protein core are rich in threonine, serine and hydroxyproline enabling post-translational O-glycosylation. The highly glycosylated properties of mucins make them resistant to proteolysis and able to hold water, giving them the gel-like properties found in mucosal barriers. Mucins also contain cysteine-rich regions that participate in intermolecular cross-linking and are typically secreted as large aggregates. Mucins may also be associated with membranes and may serve as receptor-like ligands for carbohydrate-binding molecules.
Mucin

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M3895 Mucin from bovine submaxillary glands Type I-S
M1778 Mucin from porcine stomach Type III, bound sialic acid 0.5-1.5 %, partially purified powder
M2378 Mucin from porcine stomach Type II