Chinese scorpion toxin structure. Molecular model of the toxin BmBKTtx1, produced by the Chinese scorpion (Buthus martensi Karsch). It is a short-chain toxin that blocks calcium-activated potassium channels in the victim's body. The Chinese scorpion is a widely distributed scorpion species in Asia, especially in Korea. Many toxins from the species have been isolated and they may prove a valuable resource for identifying potential anti-inflammatory and analgesic drugs.