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S3887

Sigma-Aldrich

Streptavidin–β-Galactosidase conjugate

streptavidin 1-2 units/mg protein, lyophilized powder

Synonyme(s) :

Streptavidin–beta-Galactosidase conjugate

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About This Item

Numéro MDL:
Code UNSPSC :
12352203
Nomenclature NACRES :
NA.46

Étiquette/Marqueur

beta-galactosidase tagged

Forme

lyophilized powder

streptavidin activity

1-2 units/mg protein

Composition

Protein, ≥80% biuret

Température de stockage

−20°C

Description générale

Streptavidin, a biotin binding protein produced by the bacteria Streptomyces avidinii, is a very high affinity and specificity non-covalent biotin binding protein that is used in a wide range of biochemical/immunological assays such as western blot and ELISAs. It is a component of the streptavidin-biotin system; wherein biotin is conjugated to a target molecule that is later detected by a signal tagged streptavidin. Streptavidin may be covalently tagged with a range of enzymes that develop chromogenic sustrates or fluorescent molecules to support detection systems.
β-galactosidase may be used in genetic, molecular and immunologic detection systems. Active β-galatosidase cleaves the detection molecule X-gal (5-bromo-4-chloro-indolyl-β-D-galactopyranoside) to form an intense blue product that may be detected by chromogenic techniques.

Spécificité

Streptavidin–β-Galactosidase conjugate is reactive with biotin labeled molecules.

Application

Streptavidin–β-Galactosidase conjugate may be used in conjunction with biotin labeled molecules in techniques such as ELISA, immunohistochemistry, protein blotting or with biotinylated DNA probes. It provides a convenient yet highly sensitive and specific detection system.
Streptavidin–ß-Galactosidase conjugate has been used in the fusion assay in chinese hamster ovary cells.

Forme physique

Contains Tris buffer salts.

Notes préparatoires

Streptavidin and β-galactosidase grade VIII are conjugated by a modification of the method of O′Sullivan and purified by gel filtration.

Clause de non-responsabilité

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)


Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

A simple method for the preparation of enzyme-antibody conjugates.
M J O'Sullivan
Febs Letters, 95 (1978)
Human herpesvirus 8 glycoprotein B (gB), gH, and gL can mediate cell fusion
Pertel PE
Journal of Virology, 76, 4390-4400 (2002)
R S Niedbala et al.
Journal of biochemical and biophysical methods, 13(4-5), 205-210 (1986-11-01)
Parameters and conditions of an enzyme based assay for biotin and avidin are presented. Biotinylated glucose-6-phosphate dehydrogenase when complexed with avidin becomes inactivated. Thus it was possible to construct a competitive assay system for biotin. The assay is sensitive between
A simple method for the preparation of enzyme-antibody conjugates.
M J O'Sullivan et al.
FEBS letters, 95(2), 311-313 (1978-11-15)

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