Which of the following toxin inhibits the peptidyl transferase?: (A) Ricin, (B) Diphtheria toxin, (C) Peussis toxin, (D) Amanitin
Answer is A. Ricin In the seeds of castor beans (Ricinus communis) Glycosidase-cleaves an adenine residue from the 28S rRNA (peptidyl transferase) Lethal dose - 500 mg