What is "gelonin"

n. (context protein English) A protein toxin found in the seeds of the Himalayan plant ''Gelonium multiflorum''

Gelonin is a protein toxin of approximately 30 kDa found in the seeds of the Himalayan plant Gelonium multiflorum. In cell-free systems gelonin exerts powerful N-glycosidase activity on the 28S rRNA unit of eukaryotic ribosomes by cleaving out adenine at the 4324 site.