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Ricin (/ ˈ r aɪ s ɪ n / RY-sin) is a lectin (a carbohydrate-binding protein) and a highly potent toxin produced in the seeds of the castor oil plant, Ricinus communis.The median lethal dose (LD 50) of ricin for mice is around 22 micrograms per kilogram of body weight via intraperitoneal injection.
Although the lethal dose in adults is considered to be four to eight seeds, reports of actual poisoning are relatively rare. [21] According to the Guinness World Records, this is the world's most poisonous common plant. [22] If ricin is ingested, symptoms commonly begin within two to four hours, but may be delayed by up to 36 hours.
The castor seed contains ricin, a toxic lectin. Heating during the oil extraction process denatures and deactivates the lectin. Harvesting castor beans, though, may not be without risk. [58] The International Castor Oil Association FAQ document states that castor beans contain an allergenic compound called CB1A.
Rudakubana also admitted possessing a knife on the date of the attack, production of a biological toxin, ricin, on or before 29 July and possession of information likely to be useful to a person ...
He is accused of producing a biological toxin after officers discovered a substance which was found to be ricin, a poison found in castor beans, in a search of his home.
The letter contained a fine powdery substance that later tested positive for ricin. Investigators said it was low potency and was not considered a health risk. [17] This information was not made public for nearly three months, [17] when preliminary tests showed the presence of ricin in an office mailroom of U.S. Senate Majority Leader Bill ...
A Marine Corps veteran who authorities said tried to fake his own death after a falling out with a Virginia-based militia group pleaded guilty Wednesday to illegal possession of ricin, a ...
One example of the powerful biological attributes of lectins is the biochemical warfare agent ricin. The protein ricin is isolated from seeds of the castor oil plant and comprises two protein domains. Abrin from the jequirity pea is similar: One domain is a lectin that binds cell surface galactosyl residues and enables the protein to enter cells.