TsTX-IV, a short chain four-disulfide-bridged neurotoxin from Tityus serrulatus venom which acts on 'Ca POT.2' on ' Ca POT.2+' -activated 'K POT.+' channels - Novello, José C; Arantes, Eliane Candiani; Varanda, Wamberto Antônio; Oliveira, Benedito; Giglio, José Roberto; Marangoni, Sérgio (Toxicon, 1999)