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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.
Abrin resembles ricin, in that it also is a type 2 ribosome-inactivating protein (RIP-II) with a similar mode of action, but the effect of abrin is more potent than that of ricin. [13] The toxic effect of abrin is due to an intracellular, multi-step process.
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.
Axel Rudakubana, 18, will appear at Westminster Magistrates’ Court by video link on Wednesday charged with production of a biological toxin called ricin
BOSTON (Reuters) - A Vermont woman who planned to poison herself manufactured the deadly ricin substance in the retirement home where she lived and tested it on her fellow residents, federal ...
A letter addressed to the president that was intercepted before it reached the White House tested positive for the deadly poison ricin, officials said.
Lavy stated that he purchased the ricin to poison coyotes on his farm in Arkansas and keep them away from his chickens. Lavy was stopped at the Beaver Creek border crossing by Canadian custom agents who found, along with the 130 grams of ricin, $89,000, a knife, four guns, and 20,000 rounds of ammunition.
No ricin present at scene of attack, police say. The 18-year-old has also been charged with producing ricin, a poison found in castor beans, contrary to section one of the Biological Weapons Act 1984.