Abstract
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 of the protein was estimated to be 116,000 and 91,000 by SDS-PAGE and mass spectrometry, respectively. A blast search on the amino-terminal amino acid sequence of the purified protein revealed that the protein had no homology to any other protein on data base.
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