Phosphorothioates were substituted into double-stranded DNA to study protonated Class I A+·C basepairs by 31P NMR. The method was effective in reporting the A+·C pKa. pKa values near 7.0 were found with optimal nearest-neighbor partners. Such pKa values could expand the catalytic repertoire of nucleic acids.
All Science Journal Classification (ASJC) codes
- General Chemistry
- Colloid and Surface Chemistry