Assertion: nucleic acid nucleic acid | /r/HasProperty | promising starting point
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text: Glycerol nucleic acid (GNA), which is based upon an acyclic, three-carbon backbone (Figure 1A), is a promising starting point for the construction of an artificial genetic system owing to its ability to form stable, antiparallel duplexes.(1, 2) As proposed by Orgel,(3) we imagine that a nonenzymatic, template-directed polymerization process mediated replication during the evolution of early genetic systems,(4, 5) in place of enzymatic replication as in the modern genetic system.