Cholera Toxin

Useful for studies involving adenylate cyclase, AMP, and related membrane-transport phenomena. Consists of a single A subunit surrounded by five polypeptide chains of the B subunits. The A subunit catalyzes the ADP-ribosylation of the α-subunit of G-proteins, reducing intrinsic GTPase activity and activating the α-subunit. The B subunits are responsible for the attachment of the native toxin on the cell surface.

Useful for studies involving adenylate cyclase, AMP, and related membrane-transport phenomena. Consists of a single A subunit surrounded by five polypeptide chains of the B subunits. The A subunit catalyzes the ADP-ribosylation of the α-subunit of G-proteins, reducing intrinsic GTPase activity and activating the α-subunit. The B subunits are responsible for the attachment of the native toxin on the cell surface..

Useful for tissue culture applications.

Cell permeable: no

Primary Target
α-subunit of G-proteins

Product does not compete with ATP.

Reversible: no

Please refer to vial label for lot-specific concentration.

yes

Toxicity: Highly Toxic (H)

Lyophilized from 200 mM NaCl, 50 mM Tris, 1 mM EDTA, pH 7.5.

Following reconstitution, store in the refrigerator (4°C). Aqueous stock solutions are stable for up to 6 months at 4°C under sterile conditions.

Please refer to the vial label for lot-specific reconstitution. Note: cholera toxin tends to breakdown into its A and B subunits when the solution is frozen or with vigorous shaking during reconstitution, resulting in damage to the toxin protein and concomitant loss of biological activity. Swirl bottles gently during reconstitution. Avoid vigorous pipetting of solutions that would lead to foaming. Heating of cholera toxin in excess of 40-50°C results in aggregation and subsequent breakdown into its A and B subunits.

Binding activity is assessed by hemagglutination assay using trisialoganglioside fixed sheep red blood cells.

single band by disc gel electrophoresis

Due to the nature of the Hazardous Materials in this shipment, additional shipping charges may be applied to your order. Certain sizes may be exempt from the additional hazardous materials shipping charges. Please contact your local sales office for more information regarding these charges.

Gilman, A.G. 1987. Annu. Rev.Biochem.56, 615.

Not available for sale outside of the United States.

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany