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- Avidin abstract "Avidin is a tetrameric or dimeric biotin-binding protein produced in the oviducts of birds, reptiles and amphibians and deposited in the whites of their eggs. In chicken egg white, avidin makes up approximately 0.05% of total protein (approximately 1.8 mg per egg). The tetrameric protein contains four identical subunits (homotetramer), each of which can bind to biotin (Vitamin B7, vitamin H) with a high degree of affinity and specificity. The dissociation constant of avidin is measured to be KD ≈ 10−15 M, making it one of the strongest known non-covalent bonds.In its tetrameric form, avidin is estimated to be between 66–69 kDa in size. 10% of the molecular weight is attributed to carbohydrate content composed of four to five mannose and three N-acetylglucosamine residues. The carbohydrate moieties of avidin contain at least three unique oligosaccharide structural types that are similar in structure and composition.Functional avidin is found only in raw egg, as the biotin avidity of the protein is destroyed by cooking. The natural function of avidin in eggs is not known, although it has been postulated to be made in the oviduct as a bacterial growth-inhibitor, by binding biotin the bacteria need. As evidence for this, streptavidin, a loosely related protein with equal biotin affinity and a very similar binding site, is made by certain strains of Streptomyces bacteria, and is thought to serve to inhibit the growth of competing bacteria, in the manner of an antibiotic.A non-glycosylated form of avidin has been isolated from commercially prepared product; however, it is not conclusive as to whether the non-glycosylated form occurs naturally or is a product of the manufacturing process.".
- Avidin symbol "Avidin".
- Avidin thumbnail PDB_1sws_EBI.jpg?width=300.
- Avidin wikiPageExternalLink books?id=sMgpDLCl2z8C&pg=PA85.
- Avidin wikiPageExternalLink 0890585.pdf.
- Avidin wikiPageExternalLink bj3160193.htm.
- Avidin wikiPageExternalLink quips?story=avidin.
- Avidin wikiPageExternalLink e5.full.
- Avidin wikiPageExternalLink pmidlookup?view=long&pmid=326797.
- Avidin wikiPageExternalLink www.pdbe.org.
- Avidin wikiPageID "2928327".
- Avidin wikiPageRevisionID "601744856".
- Avidin caption "core-streptavidin mutant d128a at pH 4.5".
- Avidin hasPhotoCollection Avidin.
- Avidin interpro "IPR005468".
- Avidin name "Avidin".
- Avidin pfam "PF01382".
- Avidin prosite "PDOC00499".
- Avidin scop "1".
- Avidin symbol "Avidin".
- Avidin subject Category:Glycoproteins.
- Avidin type Abstraction100002137.
- Avidin type Chemical114806838.
- Avidin type Compound114818238.
- Avidin type ConjugatedProtein114731135.
- Avidin type Glycoprotein114888310.
- Avidin type Glycoproteins.
- Avidin type Macromolecule114944888.
- Avidin type Material114580897.
- Avidin type Matter100020827.
- Avidin type Molecule114682133.
- Avidin type OrganicCompound114727670.
- Avidin type Part113809207.
- Avidin type PhysicalEntity100001930.
- Avidin type Protein114728724.
- Avidin type Relation100031921.
- Avidin type Substance100019613.
- Avidin type Thing100002452.
- Avidin type Unit109465459.
- Avidin type Biomolecule.
- Avidin type Protein.
- Avidin type BiologicalObject.
- Avidin comment "Avidin is a tetrameric or dimeric biotin-binding protein produced in the oviducts of birds, reptiles and amphibians and deposited in the whites of their eggs. In chicken egg white, avidin makes up approximately 0.05% of total protein (approximately 1.8 mg per egg). The tetrameric protein contains four identical subunits (homotetramer), each of which can bind to biotin (Vitamin B7, vitamin H) with a high degree of affinity and specificity.".
- Avidin label "Avidin".
- Avidin label "Avidin".
- Avidin label "Avidina".
- Avidin label "Avidina".
- Avidin label "Avidine".
- Avidin label "Awidyna".
- Avidin label "Авидин".
- Avidin label "アビジン".
- Avidin sameAs Avidin.
- Avidin sameAs Avidina.
- Avidin sameAs Avidine.
- Avidin sameAs Avidina.
- Avidin sameAs アビジン.
- Avidin sameAs Awidyna.
- Avidin sameAs m.08d870.
- Avidin sameAs Q424219.
- Avidin sameAs Q424219.
- Avidin sameAs Avidin.
- Avidin wasDerivedFrom Avidin?oldid=601744856.
- Avidin depiction PDB_1sws_EBI.jpg.
- Avidin isPrimaryTopicOf Avidin.