Cat #: STH-340
Alternative Name κ-Sparatoxin-Hv1b, κ-SPRTX-Hv1b, Toxin KJ6, HpTX2
This product is freeze dried. All water molecules have been removed.
Every lot is tried & tested in a relevant biological assay.
Origin Heteropoda venatoria (Brown huntsman spider).
Source Synthetic peptide
MW: 3413 Da.
Purity: >98% (HPLC)
Effective concentration 100-500 nM.
Modifications Disulfide bonds between Cys3-Cys17, Cys10-Cys22, and Cys16-Cys26. Trp30 - C-terminal amidation.
Molecular formula C144H213N39O46S6.
Activity Heteropodatoxin-2 is an inhibitor of voltage-gated K+ channels of the KV4 family. Inhibition of KV4.3 and KV4.2 is strongly voltage-dependent, while inhibition of KV4.1 shows less voltage-dependence. Lacks affinity for KV1.4, KV2.1 and KV3.41,2. Also blocks Ca2+ channels1.
Shipping and storage Shipped at room temperature. Product as supplied can be stored intact at room temperature for several weeks. For longer periods, it should be stored at -20°C.
Solubility Any aqueous buffer. Centrifuge all product preparations before use (10000 x g 5 min).
Storage of solutions Up to one week at 4°C or three months at -20°C.
Alomone Labs Heteropodatoxin-2 inhibits KV4.2 channel currents expressed in Xenopus oocytes.Currents were elicited by application of voltage step from a holding potential of -100 mV to 0 mV in 100 msec, delivered every 10 seconds. A. Time course of channel activity (current amplitude at +0 mV), before (black) and during (green) application of 100 nM Heteropodatoxin-2 (#STH-340). B. Example of superimposed current traces before (black) and during (green) application of 100 nM Heteropodatoxin-2, taken from the experiment in A.
Heteropodatoxin-2 is a synthetic peptide purified to homogeneity, originally isolated from the Heteropoda venatoria spider venom1,2. Heteropodatoxin-2 is an inhibitor of voltage-gated K+ channels of the KV4 family. Inhibition of KV4.3 and KV4.2 is strongly voltage-dependent, while inhibition of KV4.1 shows less voltage-dependence. Heteropodatoxin-2 lacks affinity for KV1.4, KV2.1 and KV3.41,3. It also blocks Ca2+ channels1.
Target KV4 K+ channels
Net Peptide Content: 100%
Last update: 28/05/2019
Heteropodatoxin-2 (#STH-340) is a highly pure, synthetic, and biologically active peptide toxin.
For research purposes only, not for human use