Potently, completely and reversibly blocks voltage-gated potassium channel Kv1.2/KCNA2 and Shaker B (Sh). Also blocks small conductance (SK) calcium-activated potassium channel (KCNN). 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. This toxin has no effect on voltage-gated potassium channel Kv1.1/KCNA1 and Kv1.3/KCNA3. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 06 subfamily.