| Literature DB >> 8255774 |
A Chur1, B Holst, O Dahl, P Valentin-Hansen, E B Pedersen.
Abstract
The condensation of 5'-O-protected 3'-O-(2-aminoethyl)thymidine with 1,2-dideoxy-1-thyminyl-beta-D-erythro-pentofuranuronic acid gives a T*T dimer with * representing a 3'-OCH2CH2NHC(O)-4' linkage connecting the two pentofuranosyl moieties. The incorporation of this dimer in oligonucleotide sequences show only moderately lowered Tm values when hybridized with a complementary DNA relative to the unmodified DNA duplex. Consistently, no looped-out or bubble-type structure could be detected in DNA duplexes with an internal T*T module. Moreover, the 5-atom carboxamide linker causes complete stop on DNA polymerization and on exonuclease III degradation.Entities:
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Year: 1993 PMID: 8255774 PMCID: PMC310634 DOI: 10.1093/nar/21.22.5179
Source DB: PubMed Journal: Nucleic Acids Res ISSN: 0305-1048 Impact factor: 16.971