Ricin is protein toxin found in castor beans, and is applied as …

• Overview
• Mode of action
• Potential medicinal use
• Use as a chemical/biological warfare agent
• Symptoms of ricin poisoning
• How likely is someone to die from ricin poisoning?
• Detected ricin incidents
• Ricin biosynthesis
• Reference

(Most of the contents are derived from works in Wikipedia: Ricin -- Ed.)