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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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2041 Results
  • 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
  • GsMTx-4
    Bioassay Tested
    GsMTx-4
    A potent inhibitor of mechanosensitive ion channels (Piezo1, TRPC1, TRPC6) and NaV1.7 sodium channels
    • Product Code: STG-100
    • Short Description: A potent inhibitor of mechanosensitive ion channels (Piezo1, TRPC1, TRPC6) and NaV1.7 sodium channels
    • Applications: Electrophysiology
    • CAS No.: 1209500-46-8
    • MW: 4096 Da
  • Ergtoxin-1
    Bioassay Tested
    Ergtoxin-1
    A potent and selective blocker of hERG (KV11.1) potassium channels
    • Product Code: STE-450
    • Short Description: A potent and selective blocker of hERG (KV11.1) potassium channels
    • Applications: Electrophysiology
    • CAS No.: 8006-25-5
    • MW: 4730 Da
  • DkTx-K2
    Bioassay Tested
    DkTx-K2
    A reversible activator of TRPV1 channels
    • Product Code: STD-020
    • Short Description: A reversible activator of TRPV1 channels
    • Applications: Electrophysiology
    • MW: 3675.3 Da
  • DkTx
    Bioassay Tested
    DkTx
    A potent, nearly irreversible activator of TRPV1 channels
    • Product Code: STD-010
    • Short Description: A potent, nearly irreversible activator of TRPV1 channels
    • Applications: Electrophysiology
    • MW: 8529 Da
  • α-Conotoxin PeIA
    Bioassay Tested
    α-Conotoxin PeIA
    An antagonist of neuronal nAChRs (α9α10, α6-containing, and α3/β2) that also inhibits N-type (CaV2.2) calcium channels via GABA(B) receptor activation
    • Product Code: STC-970
    • Short Description: An antagonist of neuronal nAChRs (α9α10, α6-containing, and α3/β2) that also inhibits N-type (CaV2.2) calcium channels via GABA(B) receptor activation
    • Applications: Electrophysiology
    • CAS No.: 866876-88-2
    • MW: 1652 Da
  • α-Conotoxin AuIA
    Bioassay Tested
    α-Conotoxin AuIA
    A selective antagonist of the neuronal α3/β4 nicotinic acetylcholine receptors (nAChRs)
    • Product Code: STC-960
    • Short Description: A selective antagonist of the neuronal α3/β4 nicotinic acetylcholine receptors (nAChRs)
    • Applications: Electrophysiology
    • CAS No.: 216299-20-6
    • MW: 1726 Da
  • α-Conotoxin EI
    Bioassay Tested
    α-Conotoxin EI
    A potent and selective antagonist of the muscle-type nicotinic acetylcholine receptor (nAChR)
    • Product Code: STC-900
    • Short Description: A potent and selective antagonist of the muscle-type nicotinic acetylcholine receptor (nAChR)
    • Applications: Electrophysiology
    • CAS No.: 170663-33-9
    • MW: 2093.4 Da
  • α-Conotoxin PIA
    Bioassay Tested
    α-Conotoxin PIA
    A potent and selective antagonist of neuronal α6*-containing nicotinic acetylcholine receptors (nAChRs)
    • Product Code: STC-870
    • Short Description: A potent and selective antagonist of neuronal α6*-containing nicotinic acetylcholine receptors (nAChRs)
    • Applications: Electrophysiology
    • CAS No.: 669050-68-4
    • MW: 1981 Da
  • ω-Conotoxin RVIA
    Bioassay Tested
    ω-Conotoxin RVIA
    A potent and selective blocker of neuronal N-type (CaV2.2) calcium channels
    • Product Code: STC-850
    • Short Description: A potent and selective blocker of neuronal N-type (CaV2.2) calcium channels
    • Applications: Electrophysiology
    • MW: 2913.3 Da
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