Selectively inhibits Kv7.1/KCNQ1 channel (Kd=11.69 uM) and inhibits Kv1.1/KCNA1, Kv1.2/KCNA2, Kv1.3/KCNA3 with a very low potency. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). Does not show activity on ion channels KCa1.1/KCNMA1, KCa2.3/KCNN3 and TRPV1. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 28 subfamily. PubMed:22511981 describes the 3D-structure 2LIX submitted to PDB as being secreted by Isometrus maculatus (and not by Lychas mucronatus as indicated in the PDB entry).