Table 1.

Overview of some xeno nucleotides created so far

Short name	Nucleotide name	Backbone	Base pairs	Outgoing motif	References
HNA	hNTP	Hexose	A-T, G-C	Triphosphate	3,35
TNA	tNTP	Threose	A-T, G-C	Triphosphate	36–38
GNA	gNTP	Glycol	A-T, G-C	Triphosphate	39
CeNA	ceNTP	Cyclohexenyl	A-T, G-C	Triphosphate	37
LNA	lNTP	Ribose with an extra bridge connecting the 2′ and 4′ carbons	A-T, G-C	Triphosphate	40,41
PNA		Desoxyribose	A-T, C-7DGa	Protein	42–44

7-Deazaguanine.