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Key Documents

C9972

Sigma-Aldrich

Cholera Toxin B subunit

biotin conjugate, lyophilized powder

Sinonimo/i:

CTB

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About This Item

Numero MDL:
Codice UNSPSC:
12352200
ID PubChem:
NACRES:
NA.77

Coniugato

biotin conjugate

Livello qualitativo

Forma fisica

lyophilized powder

PM

~12 kDa

Composizione

Protein, ~40% Lowry

Temperatura di conservazione

2-8°C

Stringa SMILE

CCOc1ccccc1C(=O)Nc2ccc(Cl)c(c2)C(F)(F)F

InChI

1S/C16H13ClF3NO2/c1-2-23-14-6-4-3-5-11(14)15(22)21-10-7-8-13(17)12(9-10)16(18,19)20/h3-9H,2H2,1H3,(H,21,22)
YDXZSNHARVUYNM-UHFFFAOYSA-N

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Descrizione generale

Cholera Toxin B (CTB) is secreted by Vibrio cholerae. CTB functions as an oral subunit vaccine for cholera, which is associated with acute watery diarrhoea. It acts as a mucosal immunogen. Cholera toxin (CT) stimulates cell surface molecules, such as antigen presenting cells (APCs), murine and human dendritic cells (DCs). CT also has immunomodulatory properties. It induces the secretion of interleukin 1 (IL-1) from macrophages and enhances their APC function.

Applicazioni

Cholera Toxin B subunit has been used:
  • in immunofluorescence
  • in the analysis of major histocompatibility complex (MHC) class II lipid raft partitioning
  • in live cell three-dimensional tracking of SH-SY5Y human neuroblastoma cells
  • to assess the toll-like receptors (TLR) and FcRγ (Fc receptor γ chain) – CARD9 (caspase recruitment domain family member 9) activation by cholera Toxin B (CTB)

Azioni biochim/fisiol

The cholera toxin B subunit is used for track tracing in neurological research, taking advantage of GM1 ganglioside binding and retrograde transport. Tissue culture cells treated with cholera toxin are not killed and tissues of animals do not become necrotic.

Qualità

Biotin content ~1.0 mole/mole protein.

Stato fisico

Lyophilized powder containing sodium phosphate buffer salts, sodium azide and sodium EDTA.

Risultati analitici

Activity measured by ELISA using ganglioside GM1-coated multiwell plates, rabbit anti-Cholera toxin B subunit, and peroxidase-labeled goat anti-rabbit IgG as the secondary antibody. 50% saturation of binding is achieved with 0.02-1 μg of Cholera toxin B subunit-biotin conjugate per mL. The conjugated B subunit gives a similar value for 50% binding to that of unconjugated B subunit from which it is prepared.

Indicazioni di pericolo

Consigli di prudenza

Classi di pericolo

Aquatic Chronic 3

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Gloves, type N95 (US)


Certificati d'analisi (COA)

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Scientific Reports, 5, 16088-16088 (2015)
Evidence for TLR4 and FcRgamma-CARD9 activation by cholera toxin B subunit and its direct bindings to TREM2 and LMIR5 receptors
Phongsisay V, et al.
Molecular Immunology, 66(2), 463-471 (2015)
The Ia. 2 epitope defines a subset of lipid raft-resident MHC class II molecules crucial to effective antigen presentation
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Journal of Immunology, 1100336-1100336 (2011)
Expression of the native cholera toxin B subunit gene and assembly as functional oligomers in transgenic tobacco chloroplasts1
Daniell H, et al.
Journal of Molecular Biology, 311(5), 1001-1009 (2001)
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