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  • The expected molecular weight (MW) listed in the product datasheet is based solely on the size of the target protein’s amino acid sequence. It’s important to remember that many factors can affect the banding pattern of your western blot including: (1) the existence of a splice variant, (2) the quality of the loaded sample, (3) the protein extraction method, and (4) the protein transfer conditions. To achieve accurate results, you may need to systematically adjust the protein extraction method or the protein transfer conditions.

    • If the band’s MW is below the expected MW it could be due to a splice variant with a slightly different MW.
      • Heat the samples at 70°C for 10 min.
      • Increase the transfer time.
    • If the band’s MW is above the expected MW, it could be due to post-translational modifications.
    • In either event, you should use a blocking peptide as a negative control.

  • Some toxins and peptides are soluble in DMSO; you can find this information in the product specification section. For these products, prepare a concentrated stock solution first.

    1. Centrifuge vial (10,000 x g, 5 minutes) before adding solvent.
    2. Dissolve the lyophilized reagent in DMSO. We recommend keeping a concentrated stock solution at 1-10 mM (100-1000X higher than the final working concentration).
    3. Once the peptide is completely dissolved in DMSO, slowly dilute the peptide in pure water (or buffer) to the desired final working concentration.

    Note: We recommend that you maintain a DMSO concentration as low as possible. For cell assays, a final concentration of 0.1–0.5% DMSO (v/v) is considered acceptable. For other experiments, 5% DMSO (v/v) is recommended; adjust this according to your experimental requirements.

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1338 Results
  • Heteropodatoxin-1
    Bioassay Tested
    Heteropodatoxin-1
    An activator of NaV1.9 and an inhibitor of KV4.2 and NaV1.7
    • Product Code: STH-320
    • Short Description: An activator of NaV1.9 and an inhibitor of KV4.2 and NaV1.7
    • Applications: Electrophysiology
    • MW: 3910.4 Da
  • HsTx1 Toxin
    Bioassay Tested
    HsTx1 Toxin
    A potent blocker of KV1.3 K+ channels
    • Product Code: STH-300
    • Short Description: A potent blocker of KV1.3 K+ channels
    • Applications: Electrophysiology
    • MW: 3818.5 Da
  • Hd1a Toxin
    Bioassay Tested
    Hd1a Toxin
    A potent and selective blocker of NaV1.7 channels
    • Product Code: STH-200
    • Short Description: A potent and selective blocker of NaV1.7 channels
    • Applications: Electrophysiology
    • MW: 3822.4 Da
  • m3-Huwentoxin IV
    Bioassay Tested
    m3-Huwentoxin IV
    A highly potent blocker of the neuronal NaV1.7 voltage-gated sodium channels, with high affinity for other neuronal TTX-sensitive (NaV) subtypes
    • Product Code: STH-102
    • Applications: Electrophysiology
    • MW: 3986 Da
  • Huwentoxin-I
    Bioassay Tested
    Huwentoxin-I
    A presynaptic blocker of N-type (CaV2.2) calcium channels, TTX-sensitive (NaV) sodium, and muscle nAChR channels
    • Product Code: STH-050
    • Applications: Electrophysiology
    • MW: 3750 Da
  • GpTx-1
    Bioassay Tested
    GpTx-1
    A potent and selective blocker of the neuronal NaV1.7 voltage-gated sodium channels
    • Product Code: STG-400
    • Short Description: A potent and selective blocker of the neuronal NaV1.7 voltage-gated sodium channels
    • Applications: Electrophysiology
    • MW: 4073.9 Da
  • GsAF-II
    Bioassay Tested
    GsAF-II
    A potent gating modifier of tetrodotoxin-sensitive (TTX-s) neuronal voltage-gated sodium (NaV) channels that also blocks hERG1 potassium channels
    • Product Code: STG-350
    • Short Description: A potent gating modifier of tetrodotoxin-sensitive (TTX-s) neuronal voltage-gated sodium (NaV) channels that also blocks hERG1 potassium channels
    • Applications: Electrophysiology
    • MW: 3979.8 Da
  • GsAF-I
    Bioassay Tested
    GsAF-I
    A potent gating modifier of tetrodotoxin-sensitive (TTX-s) neuronal voltage-gated sodium (NaV) channels that also blocks hERG1 potassium channels
    • Product Code: STG-300
    • Short Description: A potent gating modifier of tetrodotoxin-sensitive (TTX-s) neuronal voltage-gated sodium (NaV) channels that also blocks hERG1 potassium channels
    • Applications: Electrophysiology
    • MW: 3707.5 Da
  • GrTx1
    Bioassay Tested
    GrTx1
    A potent gating modifier of tetrodotoxin-sensitive (TTX-s) neuronal voltage-gated sodium (NaV) channels that also blocks hERG1 potassium channels
    • Product Code: STG-250
    • Short Description: A potent gating modifier of tetrodotoxin-sensitive (TTX-s) neuronal voltage-gated sodium (NaV) channels that also blocks hERG1 potassium channels
    • Applications: Electrophysiology
    • MW: 3697.5 Da
  • Guangxitoxin-1E
    Bioassay Tested
    Guangxitoxin-1E
    A potent gating modifier of KV2.1 and KV2.2 K+ channels that also inhibits KV4.3 channels
    • Product Code: STG-200
    • Short Description: A potent gating modifier of KV2.1 and KV2.2 K+ channels that also inhibits KV4.3 channels
    • Applications: Electrophysiology
    • CAS No.: 1233152-82-3
    • MW: 3948.7 Da
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