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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.

  • FAQ 3FAQ 3FAQ 3FAQ 3

1338 Results
  • 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
    • 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
    • Applications: Electrophysiology
    • MW: 8529 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
  • α-Conotoxin SI
    Bioassay Tested
    α-Conotoxin SI
    A potent and selective antagonist of the muscle-type nicotinic acetylcholine receptors (nAChRs)
    • Product Code: STC-825
    • Short Description: A potent and selective antagonist of the muscle-type nicotinic acetylcholine receptors (nAChRs)
    • Applications: Electrophysiology
    • CAS No.: 115797-06-3
    • MW: 1353.6 Da
  • µ-Conotoxin BuIIIC
    Bioassay Tested
    µ-Conotoxin BuIIIC
    A potent and selective blocker of skeletal muscle NaV1.4 voltage-gated sodium channels
    • Product Code: STC-690
    • Short Description: A potent and selective blocker of skeletal muscle NaV1.4 voltage-gated sodium channels
    • Applications: Electrophysiology
    • MW: 3006 Da
  • Ceratotoxin-1
    Bioassay Tested
    Ceratotoxin-1
    A potent blocker of neuronal NaV1.2 voltage-gated sodium channels that also inhibits NaV1.1, NaV1.4, NaV1.5 and NaV1.7 channels
    • Product Code: STC-680
    • Applications: Electrophysiology
    • MW: 4044.6 Da
  • µ-Conotoxin BuIIIB
    Bioassay Tested
    µ-Conotoxin BuIIIB
    A potent blocker of NaV1.3 and NaV1.4 sodium channels that also inhibits NaV1.1 and NaV1.2 subtypes
    • Product Code: STC-661
    • Short Description: A potent blocker of NaV1.3 and NaV1.4 sodium channels that also inhibits NaV1.1 and NaV1.2 subtypes
    • Applications: Electrophysiology
    • MW: 2763 Da
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