Blocker of A-type voltage-gated potassium channels of cerebellar granular cells. May also inhibit Kv4/KCND when coexpressed with DPP6 or DPP10. The occlusion of the outer entry of the K(+) conducting pore is partially reversible and affects both open and closed channels. It shares the same target in rat brain than BmTX3 (AC Q8I0L5) and AmmTX3 (AC P60208). Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to a beta-sheet by disulfide bonds (CSalpha/beta). Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 15 subfamily.