title: Unnatural base pairs: (n., pl.) man-made carbon-based molecules that can substitute for or extend the natural set of molecules that make up DNA.
mesh_terms: D020029:Base Pairing / Q000235:genetics*; D002244:Carbon; D004247:DNA / Q000138:chemical synthesis* / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005815:Genetic Code / Q000235:genetics
chemical_list: D002244:Carbon; D004247:DNA