Blocks human and/or rat Kv11.1/KCNH2/ERG1, Kv11.2/KCNH6/ERG2 and Kv11.3/KCNH7/ERG3 by binding to channel outer vestibule (S5P domain) with a 1:1 stoichiometry (By similarity). Has also a minimal effect on rat ELK1/KCNH4 potassium channels (By similarity). Has been shown to weakly inhibit Kv11.1/KCNH2/ERG1, Kv1.1/KCNA1, Kv1.2/KCNA2 and Kv1.3/KCNA3 voltage-gated potassium channels (PubMed:29483648). Expressed by the venom gland. Has the CSalpha/beta fold, which comprises one or two short alpha helices connected to anti-parallel beta-sheets stabilized by three or four disulfide bonds. Monoisotopic mass. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Gamma-KTx 2 subfamily. Has been classified as a gamma-KTx toxin due to its molecular target (Kv11/ERG), but could be classified as an alpha-KTx since it shares a high level of homology in both primary and 3D structures with other alpha-KTx scorpion toxins.