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Ricin
Definition 1
A highly toxic protein phytotoxin lectin and hemagglutin from the seeds of Ricinus communis, the castor oil plant. It agglutinates cells, is proteolytic, and causes lethal inflammation and hemorrhage if taken internally. It has N-glycosidase activity that cleaves 28S rRNA, halting protein synthesis; extreme cytotoxicity makes ricin an attractive candidate for artificial fusion with binding proteins to create cell-type-specific toxins. (NCI Thesaurus)
Definition 2
A protein phytotoxin from the seeds of Ricinus communis, the castor oil plant. It agglutinates cells, is proteolytic, and causes lethal inflammation and hemorrhage if taken internally. (NLM, Medical Subject Headings)
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