TsTX-IV is a short chain four-disulfide-bridged neurotoxin which acts on 'Ca POT. +2' activated 'K POT. +' channels - Varanda, Wamberto Antônio; Arantes, Eliane Candiani; Novello, J C; Oliveira, B.; Marangoni, S; Giglio, José Roberto (Simpósio da Sociedade Brasileira de Toxinologia, 1998)