Potency difference between the zwitterion form and the cation forms of tetrodotoxin.
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001001:Anura; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D007477:Ions; D008566:Membranes; D012584:Sciatic Nerve / Q000502:physiology; D012996:Solutions; D013779:Tetrodotoxin; D014118:Toxins, Biological / Q000494:pharmacology*
D007477:Ions; D012996:Solutions; D014118:Toxins, Biological; D013779:Tetrodotoxin