Blocks Shaker B (Sh) and voltage-gated potassium-channels Kv1.1/KCNA1, Kv1.2/KCNA2, Kv1.3/KCNA3. Also inhibits small conductance calcium-activated potassium channels (KCNN) and intermediate conductance calcium-activated potassium channel (KCa3.1/KCNN4). 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 25 ug/kg by intracerebroventricular injection into mice. This toxin does not inhibit Kv1.5/KCNA5 and Kv3.1/KCNC1. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 10 subfamily.