Synthesis of Decadeoxyribonucleotides Containing 5-modified Uracils and Their Interactions with Restriction Endonucleases Bgl II, Sau 3AI and Mbo I (nucleosides and Nucleotides 82)
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Decadeoxyribonucleotides containing uracil, 5-bromouracil, 5-cyanouracil and 5-ethyluracil in recognition sequences of restriction endonucleases Bgl II, Sau 3AI, Mbo I were synthesized. Decanucleotides containing 5-bromouracil in place of thymine had essentially the same susceptibility to all the restriction endonucleases. Uracil-containing decanucleotides were however very resistant to attack. Decanucleotides containing 5-cyanouracil in the recognition sequence were strongly resistant to hydrolysis by Sau 3AI, but were hydrolysed by Bgl II and Mbo I as well as the parent decanucleotide. Decanucleotides containing 5-ethyluracil were strongly resistant to hydrolysis by Sau 3AI, but were partially resistant to hydrolysis by Bgl II and Mbo I.
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