11-Oxo-tetrodotoxin and a specifically labelled 3H-tetrodotoxin.

  title={11-Oxo-tetrodotoxin and a specifically labelled 3H-tetrodotoxin.},
  author={B Q Wu and Liu-meng Yang and Chi Yueh Kao and Simon Rock Levinson and Mari Yotsu-Yamashita and Takeshi Yasumoto},
  journal={Toxicon : official journal of the International Society on Toxinology},
  volume={34 4},
Tetrodotoxin was oxidized to a hydrated aldehyde, 11-oxo-tetrodotoxin, which shares the specificity of tetrodotoxin for the Na+ channel of the isolated voltage-clamped frog skeletal muscle fiber, but is four to five times more potent. It binds to the solubilized Na+ channel of eel electroplax with a similarly higher potency, because of an equilibrium dissociation constant about 0.25, and a dissociation rate constant 2.4 times slower than those for tetrodotoxin. 11-Oxo-tetrodotoxin can be… CONTINUE READING

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