Alternative Name TTX
Lyophilized Powder Lyophilized Powder
This product is freeze dried. All water molecules have been removed.
Bioassay Tested Bioassay Tested
Every lot is tried & tested in a relevant biological assay.
Our Bioassay
Origin Tetraodon pardalis (puffer fish).
Source Natural
MW: 319.28
Purity: >99% (HPLC)
Effective concentration 100 nM - 1 µM.
Chemical name Octahydro-12-(hydroxymethyl)-2-imino-5,9:7,10adimethano-10aH-[1,3]dioxocino[6,5-d]pyrimidine-4,7,10,11,12-pentol.
Molecular formula C11H17N3O8.
CAS No.: 4368-28-9.
Activity Tetrodotoxin is a potent and selective blocker of a subclass of NaV channels1, and is often used to define subclasses of NaV channels2.
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- Narahashi, T. et al. (1964) J. Gen. Physiol. 47, 965.
- Hille, B. (2001) In: Ion Channels in Excitable Membranes (third edition) chapter 3.
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 4°C.
Solubility Acidic buffer (pH 4.8). Centrifuge all product preparations before use (10000 x g 5 min).
Storage of solutions Up to one week at 4°C or six months at -20°C.
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Alomone Labs Tetrodotoxin citrate free inhibits native NaV currents in PC12 and ND7-23 cells.Tetrodotoxin citrate free (#T-500) inhibits PC12 (top) and ND7-23 (bottom) cells at a concentration of 60 nM. Left graphs show the time course of inward current amplitude upon bath application (marked by the horizontal bars) and wash of TTX. Membrane potential was clamped to -120 mV and currents were elicited by 20 ms test pulses to -10 or -20 mV (upper and lower graphs respectively), delivered every 10 sec. Right graphs show the superimposed traces of control current (red) and during perfusion of TTX (black).
References - Scientific background
- 1. Narahashi, T. et al. (1964) J. Gen. Physiol. 47, 965.
- 2. Hille, B. (2001) In: Ion Channels in Excitable Membranes (third edition) chapter 3.
- Tetrodotoxin (TTX) is an established potent and selective blocker of some NaV channels.1 Moreover, TTX sensitivity is used to define subclasses of NaV channels.2 It is widely used both to probe NaV activity and to reduce or block excitability in neurophysiological preparations.
Target Various NaV Na+ channels
Lyophilized Powder
Last update: 24/01/2020
Tetrodotoxin citrate free (#T-500) is a highly pure, natural, and biologically active compound.
For research purposes only, not for human use
Citations
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- Gkogkas, C.G. et al. (2012) Nature 493, 371.
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- Guzman, J.N. et al. (2009) J. Neurosci. 29, 11011.
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- Hirasawa, M. et al. (2004) J. Physiol. 559, 611.
- Jennings, E.A. et al. (2001) J. physiol. 534, 805.