Weak inhibitor of voltage-gated potassium channel hKv1.3/KCNA3. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to a beta-sheet by disulfide bonds (CSalpha/beta). Does not inhibit large conductance calcium-activated potassium channels (KCa1.1/KCNMA1). Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 16 subfamily.