Ricin is a deadly toxin released
when castor beans
are chewed and swallowed (also toxic when inhaled or
injected).
Ricin
is an alkaloid, protein toxin that can also be purposefully
extracted from the castor bean. It is more poisonous than cobra
venom, even in minute quantities about the size of a grain of
salt. Ricin gets inside body cells and causes the cells to die
by preventing them from making needed proteins.
Ricin can be made from the waste "mash"
left over from processing castor beans into oil. A modified
form of ricin has been used experimentally in medicine to selectively
kill cancer cells. It has been reported that ricin has possibly
been used as a warfare agent in the 1980s in Iraqand more recently
by terrorist organizations.
|