chemical

Chlorotoxin

STC-460

STC-460_0.1 mg

Chlorotoxin

Non Antibodies

Proteins

P45639

https://www.uniprot.org/uniprotkb/P45639/entry

Lyophilized from double distilled water (ddH2O). May contain TFA as a residual counter ion.

The reconstituted solution can be stored at 4°C for up to 1 week. For longer periods (up to 6 months), small aliquots should be stored at -20°C. We do not recommend storing the product in working solutions for longer than a few days. Avoid multiple freeze-thaw cycles.

Centrifuge the vial (10,000 × g for 5 minutes) before adding solvent to spin down all the powder to the bottom of the vial. The lyophilized product may be difficult to visualize. Add solvent directly to the centrifuged vial. Gently tap, tilt, and roll the vial to aid dissolution. Avoid vigorous vortexing; light vortexing for up to 3 seconds is acceptable if needed. The product is soluble in pure water at high micromolar concentrations (100 µM - 1 mM). For long-term storage in solution, we recommend preparing a stock solution by dissolving the product in double-distilled water (ddH2O) at a concentration between 100-1000x of the final working concentration. Divide the stock solution into small aliquots and store at -20°C. Before use, thaw the relevant vial(s) and dilute to the desired working concentration in your working buffer. Centrifuge all product preparations before use. It is recommended to prepare fresh solutions in working buffers just before use. Avoid multiple freeze-thaw cycles to maintain biological activity.

Centrifuge the vial before adding solvent (10,000 x g for 5 minutes) to spin down all the powder to the bottom of the vial. The lyophilized product may be difficult to visualize. Add solvent directly to the centrifuged vial. Tap the vial to aid in dissolving the lyophilized product. Tilt and gently roll the liquid over the walls of the vial. Avoid vigorous vortexing. Light vortexing for up to 3 seconds is acceptable if needed. The product is soluble in pure water at high micromolar concentrations (100 µM - 1 mM). For long-term storage in solution, we recommend preparing a stock solution by dissolving the product in double-distilled water (ddH2O) at a concentration between 100-1000x of the final working concentration. Divide the stock solution into small aliquots and store at -20°C. Before use, thaw the relevant vial(s) and dilute to the desired working concentration in your working buffer. Centrifuge all product preparations before use. It is recommended to prepare fresh solutions in working buffers just before use. Avoid multiple freeze-thaw cycles to maintain biological activity.

The product is shipped as a lyophilized powder at room temperature. Upon receipt, store the product at -20°C. Protect from moisture.

Leiurus quinquestriatus (scorpion)

Synthetic peptide

CLCN3,MMP2

Native chlorotoxin (CTX) is a 36-amino acid peptide, originally isolated from the venom of the giant yellow Israeli scorpion Leiurus quinquestriatus hebraeus. Its primary amino acid sequence shows considerable homology to a class of short insectotoxins.1Initially, CTX was demonstrated as an irreversible inhibitor of small conductance Cl- channels in colonic epithelial cells and Cl- fluxes across glioma cell membranes.2,3 Inhibition of Cl- channels with CTX prevents cell volume changes, and in turn, inhibits tumor cell invasion and migration.4-6Immunohistochemical studies show that CTX specifically and selectively binds to glioma cell lines and to tissue biopsies from patients with various malignant gliomas and other embryonic related tumors of neuroectodermal origin but not to normal brain tissue.These findings have lead to clinical evaluation for the therapeutic and diagnostic use of CTX, a synthetic derivate, in patients with malignant glioma. This derivative of CTX has been shown to selectively label human gliomas in vivo and in vitro and demonstrated all of the known physical and biological activities of the naturally occurring CTX.7,8Further studies on the interaction of CTX with Cl- channels suggest that these effects are indirect; affinity purification with a recombinant CTX identified the matrix metalloproteinase-2 (MMP2) as a CTX binder in glioma cells. The actual receptor for CTX appears to be a protein complex that contains MMP2 and Cl- channel 3 (ClC-3). Binding of CTX induces endocytosis of this complex and hence the ClC-3 channels. This finding might explain the irreversible action of CTX and its relatively slow time course of Cl- channel blockage.9,10

Alomone Labs

Chloride channels

An Inhibitor of Chloride Channels

An Inhibitor of Chloride Channels

3995.8 Da

CTX, Cltx

Disulfide bonds between: Cys2-Cys19, Cys5-Cys28, Cys16-Cys33 and Cys20-Cys35 Arg36 - C-terminal amidation

C158H249N53O47S11

50 - 600 nM

Chlorotoxin blocks small conductance Cl- channels of epithelial cells and also blocks Cl- channels expressed in gliomas1,2.

The reconstituted solution can be stored at 4°C for up to 1 week. For longer periods (up to 6 months), small aliquots should be stored at -20°C. We do not recommend storing the product in working solutions for longer than a few days. Avoid multiple freeze-thaw cycles.

1-2 Business Days

Israel/IL

≥98% (HPLC)

163515-35-3

Lyophilized

Contact Alomone Labs for technical support and product customization

MCMPCFTTDHQMARKCDDCCGGKGRGKCYGPQCLCR-NH2

Yes

12352202

no