Comparison

FS-2 European Partner

Item no. ALO-F-700-70ug
Manufacturer Alomone
CASRN 63653-99-6
Amount 70 ug
Quantity options 5 x 70 ug 70 ug
Category
Type Molecules
Format Lyophilized
Specific against other
Purity ≥98% (HPLC)
Formula Lyophilized from double distilled water (ddH2O). May contain TFA as a residual counter ion.
Sequence RICYSHKASLPRATKTCVENTCYKMFIRTHRQYISERGCGCPTAMWPYQTECCKGDRCNK-OH
ECLASS 10.1 32169090
ECLASS 11.0 32169090
UNSPSC 12000000
Shipping Condition Room temperature
Available
Manufacturer - Type
Non Antibodies
Manufacturer - Applications
Electrophysiology
Manufacturer - Category
Proteins
Manufacturer - Targets
L-type Ca2+ channels
Country of Origin
Israel
Shipping Temperature
The product is shipped as a lyophilized powder at room temperature. Upon receipt, store the product at -20°C. Protect from moisture.
Storage Conditions
Storage as Solution: 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. - Storage before Reconstitution: The product is shipped as a lyophilized powder at room temperature. Upon receipt, store the product at -20°C. Protect from moisture. - Storage after Reconstitution: 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.
Molecular Weight
7018 Da
Manufacturer - Format
Lyophilized
Short description
A Blocker of L-Type CaV Channels
Description
Toxin FS-2, FS2 - A Blocker of L-Type CaV Channels
Reconstitution
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.
Specificity

A Blocker of L-Type CaV Channels

PH
7, 4
UNSPSC
12352202
Origin
Dendroaspis polylepis polylepis (Black mamba snake).
Modifications
Disulfide bonds between: Cys3-Cys22, Cys17-Cys39, Cys41-Cys52 and Cys53-Cys58
Effective Concentration
100 nM - 2 µM
Activity
FS-2 is an L-type CaV channel blocker1.
Solubility
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.
Sterile endotoxin free
no
Bioassay tested
yes
Scientific Background
FS-2 is a natural peptidyl toxin isolated from the Dendroaspis p. polylepsis black mamba venom by a modification of the procedure of Schweitz et al.1 and purified to homogenity. FS-2 is an L-type CaV channel blocker.2 The toxin reduced (±)Bay K8644-induced [Ca2+]in increase, in smooth muscle cells as determined by Ca2+ imaging with Fura-2.2 The IC50 for this effect was 23 nMFS-2 induced relaxation in pre-constricted rat aorta, pulmonary artery and trachea.3 In addition, it inhibited acetylcholine-induced contractions in guinea pig ileuM

Note: The presented information and documents (Manual, Product Datasheet, Safety Datasheet and Certificate of Analysis) correspond to our latest update and should serve for orientational purpose only. We do not guarantee the topicality. We would kindly ask you to make a request for specific requirements, if necessary.

All products are intended for research use only (RUO). Not for human, veterinary or therapeutic use.

Amount: 70 ug
Available: In stock
available

Delivery expected until 1/8/2026 

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