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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.
The poison used in both cases was ricin. Both assassination attempts are believed to have been organized by the Bulgarian Secret Service of the time of the Cold War with the assistance of the KGB. [2] Such an umbrella was intended to be used in the assassination of Pallo Jordan and Ronnie Kasrils by the South African Civil Cooperation Bureau ...
Ricin quickly and irreversibly inhibits ribosomes, the molecular machines responsible for producing proteins in all cells. [188] The LD 50 in adults is only about 22 μg/kg when injected or inhaled; ingested ricin is much less toxic due to the digestive activity of peptidases , although a dose of 20 to 30 mg/kg, or about 4 to 8 seeds, can still ...
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A letter addressed to the president that was intercepted before it reached the White House tested positive for the deadly poison ricin, officials said.
In 2003, a package and letter sealed in a "ricin-contaminated" envelope was intercepted in Greenville, South Carolina, at a United States Postal Service processing center. [16] Ricin was detected in the mail at the White House in Washington, D.C., in November 2003. The letter containing it was intercepted at a mail handling facility off the ...
A letter addressed to President Donald Trump that was intercepted before it reached the White House tested positive for the deadly poison ricin earlier this week, law enforcement officials said.
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 ...