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Cholera Toxin from Vibrio cholerae

≥90% (SDS-PAGE), lyophilized powder

Cholera enterotoxin, CTX, Choleragen
CAS Number:
MDL number:

Quality Level


≥90% (SDS-PAGE)


lyophilized powder


Protein, ~5% Lowry-TCA


H2O: 10 mg/mL

storage temp.


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Cholera Toxin from Vibrio cholerae has been used as a positive control in cAMP (cyclic AMP) assay for enterotoxins. It has been added as a supplement in cell culture media of primary tumors and epithelial cells.

Biochem/physiol Actions

Toxin consisting of an A subunit (27 kDa) surrounded by five B subunits (approximately 12 kDa each), which attach the toxin to ganglioside GM1 on the cell surface. The A subunit catalyzes ADP-ribosylation of the α-subunit of the stimulatory G protein (Gαs), reducing GTPase activity and activating the α-subunit. This activation of Gαs leads to an increase in the activity of adenylyl cyclase, resulting in increased levels of cAMP. Also ADP-ribosylates transducin in the eye rod outer segments, inactivating its GTPase activity. Cholera toxin has also been reported to ADP-ribosylate tubulin. Shown to be a potent mucosal vaccine adjuvant, inducing T helper cell type 2 responses by inhibiting the production of interleukin-12.

Features and Benefits

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Package size based on protein content.

Physical form

Lyophilized powder containing Tris buffer salts, sodium chloride, sodium azide and sodium EDTA


When reconstituted at 1 mg/mL in water, solution will contain 0.05 M Tris buffer salts, pH 7.5, 0.2 M NaCl, 0.003 M NaN3, and 0.001 M sodium EDTA. Store reconstituted solutions in the refrigerator.


Skull and crossbones

Signal Word


Hazard Statements

Hazard Classifications

Acute Tox. 2 Dermal - Acute Tox. 2 Oral - Acute Tox. 4 Inhalation - Aquatic Chronic 3

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials



Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

Product Information Sheet

Quotes and Ordering

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. What is the molecular weight Product C8052, Cholera enterotoxin?

    Although the molecular weight is not part of our specifications for this product, it has been reported to be 84 kDa in Biochimica Biophysica Acta, 492, 303 (1977).

  4. Is Product C8052, Cholera enterotoxin, sterile?

    It is not necessarily sterile, but the solution can be filter sterilized using a 0.2 micron pore size filter.

  5. What is the solubility and solution stability of Product C8052, Cholera enterotoxin?

    Cholera toxin is soluble in water at a concentration of 10 mg/mL. Solutions are reported to be stable for 1 year when stored at 2-8 °C, and will lose biological activity after prolonged exposure to pH below 6 or above 8, according to Mekalanos, J.J., et al., Meth. Enzymology, 165, 169-175 (1988).

  6. How is the activity of Product C8052, Cholera enterotoxin, expressed?

    The activity is expressed in terms of units/mg of protein and not as units/mL.

  7. Is Product C8052, Cholera enterotoxin, cell culture tested?

    This product is not cell culture tested.

  8. What is the shelf life of Product C8052, Cholera enterotoxin?

    Each lot of C8052 is given a retest date of three years from the QC acceptance date.

  9. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  10. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  11. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

The enterotoxin T (BcET) from Bacillus cereus can probably not contribute to food poisoning.
Choma C and Granum PE
FEMS Microbiology Letters, 217, 115-115 (2002)
Ligand-dependent corepressor contributes to transcriptional repression by C2H2 zinc-finger transcription factor ZBRK1 through association with KRAB-associated protein-1.
Calderon MR et al.
Nucleic Acids Research, 42, 7012-7012 (2014)
Contribution of CXCL12 secretion to invasion of breast cancer cells.
Boimel PJ et al.
Breast Cancer Research, 14, R23-R23 (2012)
Nicholas F Wright et al.
The Journal of comparative neurology, 521(13), 2966-2986 (2013-03-19)
Many brain structures project to both the anteroventral thalamic nucleus and the anteromedial thalamic nucleus. In the present study, pairs of different tracers were placed into these two thalamic sites in the same rats to determine the extent to which
Rapid Expansion of Human Epithelial Stem Cells Suitable for Airway Tissue Engineering.
Butler CR et al.
American Journal of Respiratory and Critical Care Medicine, 194, 156-156 (2016)

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