Abrin is a type of poison that could kill people and it is one of the most strongest poisons in the world
80S ribosomes are inhibited by a number of agents. Some are differential inhibitors 80S ribosomes (found in eukaryotic cells) and 70S Ribosomes (found in prokaryotic cells and mitochondria. Among them are: Cycloheximide (CAS 66-81-9): Inhibits peptidyl transferase activity of the 80S ribosomes, with comparatively little effect on 70S ribosomal function Ricin (CAS 9009-86-3) is a very powerful inhibitor of protein synthesis in 80S ribosomes, and it's reported to be irreversible. Ricin is extremely toxic and is considered a weapon-making material. α-sarcin (CAS 86243-64-3) cleaves a ribosomal RNA on 80S ribosomes. Other inhibitors of 80S ribosomes include Shiga-like toxin Stx2; Abrin (CAS 1393-62-0).
Abrus precatorius, known commonly as Jequirity, Crab's Eye, Rosary Pea, Precatory bean, Indian Licorice, Saga Tree or Giddee Giddee (Abrus precatorius), is a legume (related plants include peas and peanuts) with long, pinnate-leafleted leaves (multiple small leaves attached to a central stem). The seed contains the toxic poison abrin. The plant is native to Indonesia and grows in tropical and subtropical areas of the world where it has been introduced.http://en.wikipedia.org/wiki/Abrus_precatorius