Distribution of tetrodotoxin, 6-epitetrodotoxin, and 11-deoxytetrodotoxin in newts.

@article{Yotsu1990DistributionOT,
  title={Distribution of tetrodotoxin, 6-epitetrodotoxin, and 11-deoxytetrodotoxin in newts.},
  author={M. Yotsu and M. Iorizzi and T. Yasumoto},
  journal={Toxicon : official journal of the International Society on Toxinology},
  year={1990},
  volume={28 2},
  pages={
          238-41
        }
}
Tetrodotoxin was detected in all nine species of newts tested, 6-epitetrodotoxin in six species, and 11-deoxytetrodotoxin in five species. Only one species lacked the analogues, thus suggesting that the analogues were common metabolites among newts. Toxin levels were high in Taricha granulosa and Notophthalmus viridescens followed by Cynops spp. Distinct differences in toxin contents and profiles existed among species and tissues. 
The levels of tetrodotoxin and its analogue 6-epitetrodotoxin in the red-spotted newt, Notophthalmus viridescens.
Tetrodotoxin and its analogue 6-epitetrodotoxin in newts (Triturus spp.; Urodela, Salamandridae) from southern Germany.
Tissue distribution of tetrodotoxin in the red-spotted newt Notophthalmus viridescens.
The occurrence of 11-oxotetrodotoxin, a rare tetrodotoxin analogue, in the brachycephalidae frog Brachycephalus ephippium.
Further report of the occurrence of tetrodotoxin and new analogues in the Anuran family Brachycephalidae.
Further report of the occurrence of tetrodotoxin in Atelopus species (family: Bufonidae).
Tetrodotoxin levels of the rough-skin newt, Taricha granulosa, increase in long-term captivity.
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