Recombinant toxin that reversibly blocks the voltage-gated potassium channels Shaker (IC(50)=0.054 nM), rKv1.2/KCNA2 (IC(50)=15.6 nM), and rKv1.3/KCNA3 (IC(50)=12.5 uM). Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to a beta-sheet by disulfide bonds (CSalpha/beta). Does not block the potassium channel rKv1.1/KCNA1, even at 50 uM. Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 26 subfamily. recombinant MMTX