Blocks voltage-gated potassium channels Kv1.2/KCNA2 (IC(50)=0.12-0.8 nM), KCa3.1/KCNN4 (IC(50)=1-2.2 nM), Shaker B (IC(50)=2.39-80 nM), Kv1.1/KCNA1 (IC(50)=37-45 or no activity, depending on the study), Kv1.3/KCNA3 (IC(50)=150-180 or no activity, depending on the study). Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to a beta-sheet by disulfide bonds (CSalpha/beta). LD(50) is 4 ug/kg by intracerebroventricular injection into mice. Shows very weak or no activity on KCa1.1/KCNMA1, KCa2.1/KCNN1, KCa2.2/KCNN2, KCa2.3/KCNN3, Kir2.3/KCNJ4. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 06 subfamily. Has not the same disulfide pairing as other members of alpha-KTx 6.