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Mucin genes encode mucin monomers that are synthesized as rod-shaped apomucin cores that are post-translationally modified by exceptionally abundant glycosylation. The dense "sugar coating" of mucins gives them considerable water-holding capacity and also makes them resistant to proteolysis , which may be important in maintaining mucosal barriers.
The ionic charges of mucin are mainly provided by acidic amino acids including aspartic acid (pKa=3.9) and glutamic acid (pKa=4.2). The charges of acidic amino acids will change with environmental pH value due to acid dissociation and association. Aspartic acid, for example, has a negative side chain when the pH value is above 3.9, while a ...
Tannin-binding capacity of salivary mucin is directly related to its proline content. Advantages in using salivary proline-rich proteins (PRPs) to inactivate tannins are : PRPs inactivate tannins to a greater extent than do dietary proteins; this results in reduced fecal nitrogen losses, [ 2 ]
Digestion: Saliva contains amylase, which hydrolyses starch into glucose, maltose, and dextrin. As a result, saliva allows some digestion to occur before the food reaches the stomach. [30] Taste: [31] Saliva acts as a solvent in which solid particles can dissolve and enter the taste buds through oral mucosa located on the tongue. These taste ...
The secretory acinar cells of the submandibular gland have distinct functions. The mucous cells are the most active and therefore the major product of the submandibular glands is saliva which is mucoid in nature. Mucous cells secrete mucin which aids in the lubrication of the food bolus as it travels through the esophagus.
Mucin is a glycoprotein prevalent in natural saliva, and lab-made mucin can closely replicate the characteristics of natural saliva by forming a protective and lubricative film on oral surfaces. [11] Mucin has an elevated adsorption capacity compared to carboxymethyl cellulose-based formulations, which improves lubrication.
74180 Ensembl ENSG00000117983 ENSMUSG00000066108 UniProt Q9HC84 n/a RefSeq (mRNA) NM_002458 NM_028801 RefSeq (protein) NP_002449 n/a Location (UCSC) Chr 11: 1.22 – 1.26 Mb Chr 7: 141.39 – 141.43 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Mucin-5B (MUC-5B) is a protein that in humans is encoded by the MUC5B gene and by the Muc5b gene in the mouse. It is one of the five gel ...
Secretion: Saliva is the primary secretion of the oral mucosa. It has many functions including lubrication, pH buffering and immunity. The lubricating and antimicrobial functions of saliva are maintained mainly by resting; saliva results in a flushing effect and the clearance of oral debris and noxious agents.