Completely inhibits the (125)I-kaliotoxin binding on rat brain synaptosomes with high-affinity (IC(50)=0.1 nM). Is a potent Kv1.3/KCNA3 ligand. 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 10 ug/kg by intracerebroventricular injection into mice. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 03 subfamily.