threose nucleic acid

== English == === Noun === threose nucleic acid (plural threose nucleic acids) (biochemistry) An analog of RNA in which the sugar component is threose—considered to be a primordial precursor to RNA ==== Synonyms ==== threonucleic acid ==== Derived terms ==== TNA (abbreviation) ==== Related terms ==== nucleic acid ribonucleic acid (RNA) deoxyribonucleic acid (DNA) peptide nucleic acid (PNA) glycol nucleic acid (GNA)