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In puffer fish, tetrodotoxin (TTX) exists as the major toxin with chemically equilibrium analogs (4-epiTTX, 4,9-anhydroTTX) and chemically non-equilibrium analogs (deoxy analogs, 11-oxoTTX, 4-S-cysteinylTTX). There are two purposes to this study: 1) to search for the reason why TTX is the most major analog in puffer fish, even 4,9-anhydroTTX is chemically more stable, 2) to investigate whether or...
Non-toxic cultured juvenile kusafugu Fugu niphobles were fed with a diet containing highly toxic natural komonfugu Fugu poecilonotus liver until the 30th day (8.0μg of TTX and 3.7μg of 4,9-anhydroTTX/fish/day), and then fed with a non-toxic diet until the 240th day. During the 30–240th day, five or six fish were periodically sampled six times, and the contents of TTX and 4,9-anhydroTTX in each tissue...
A tetrodotoxin binding protein has been purified from the plasma of the puffer fish kusafugu, Takifugu niphobles, through DEAE-cellulose treatment, ammonium sulfate fractionation, Sephadex gelfiltrations and Sephacryl S-200 and Cellulofine A-500 column chromatography. Final purification by HPLC on a TSK G-3000 SL column yielded a protein which showed only a single protein peak. The molecular weight...
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