Potent blocker of both large-conductance calcium-activated potassium channels (KCa1.1/KCNMA1) and voltage-gated potassium channels (Kv1.3/KCNA3) (PubMed:9354615, PubMed:29483648). Has also been shown to moderately inhibit Kv1.2/KCNA2 and weakly inhibit Kv1.1/KCNA1 channels, as well as 5-hydroxytryptamine 3 receptors (HTR3A) (PubMed:29483648). 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 01 subfamily.