title: A natural classification of ribonucleases.
authors.affiliation: National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA.
authors.forename: L
authors.initials: L
authors.lastname: Aravind
authors.forename: E V
authors.initials: EV
authors.lastname: Koonin
mesh_terms: D005075:Biological Evolution; D017510:Protein Folding; D012260:Ribonucleases / Q000737:chemistry / Q000145:classification* / Q000378:metabolism
chemical_list: D012260:Ribonucleases