Ricin toxin

Ricin is a protein toxin that acts as a cellular poison and is easily produced from castor beans (Ricinus communis), which are readily available throughout the world. Waste from the commercial production of castor oil contains 5 percent ricin, making it relatively easy for such a substance to fall into the hands of terrorists. Naturally occurring cases of ricin intoxication involve ingestion of castor beans, and are marked by severe gastrointestinal symptoms, vascular collapse...