title: Origin of genetic code: A needle in the haystack of tRNA sequences.
authors.affiliation: Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: P
authors.initials: P
authors.lastname: Schimmel
mesh_terms: D000926:Anticodon / Q000235:genetics; D019143:Evolution, Molecular; D005815:Genetic Code; D008957:Models, Genetic; D009690:Nucleic Acid Conformation; D000069497:Origin of Life; D012343:RNA, Transfer / Q000737:chemistry / Q000235:genetics*
chemical_list: D000926:Anticodon; D012343:RNA, Transfer