1) Ion channel toxin 
Butantoxin (BuTX) is a compound of the venom of three Brazilian and an Argentinean scorpion species of the genus Tityus. Butantoxin reversibly blocks the voltage-gated K+ channels Shaker B and Kv1.2, and the Ca2+-activated K+ channels KCa 1.1 and KCa 3.1. ==Sources== Butantoxin is one of multiple toxins isolated from the venom of three Brazilian a...