Journal
NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS
Volume 19, Issue 10-12, Pages 1765-1777Publisher
MARCEL DEKKER INC
DOI: 10.1080/15257770008045458
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2'-O-Methyloligoribonucleotides, deoxyoligonucleotides and 2'-O-methyl/deoxy gapmers were synthesized using solid phase phosphoramidite chemistry employing the 2-(4-nitrophenyl)ethyl (npe) protection strategy. Melting temperatures of the synthesized oligonucleotides as well as their stability against degradation by several different nucleases were determined. 2'-O-Methyloligoribonucleotides showed the highest melting temperatures (T-m's) whereas 2'-O-methyl/deoxy gapmers revealed either slightly higher or surprizingly no thermal stabilities compared with their deoxy analogs when using self-complementary sequences. Gapmers with four 2'-O-methyl nucleotides on both ends showed about the same stability as all 2'-O-methyloligoribonucleotides against micrococal nuclease, nuclease S-1, and snake venom phosphodiesterase.
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