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    • 9. 发明授权
    • Exonuclease-resistant oligonucleotides
    • 核酸外切酶寡核苷酸
    • US5256775A
    • 1993-10-26
    • US555522
    • 1990-06-05
    • Brian C. Froehler
    • Brian C. Froehler
    • C07H21/00C07H21/02
    • C07H21/00
    • A method is provided for making 3' and/or 5' end-capped oligonucleotides so as to render the oligonucleotide resistant to degradation by exonucleases. The exonuclease degradation resistance is provided by incorporating two or more phosphoramidate and phosphorocmonothioate and/or phosphorodithioate linkages at the 5' and/or 3' ends of the oligonucleotide, wherein the number of phosphoramidate linkages is less than a number which would interfere with hybridization to a complementary oligonucleotide strand and/or which would interfere with RNAseH activity when the oligonucleotide is hybridized to RNA.
    • 提供了一种制备3'和/或5'末端封端寡核苷酸的方法,以使寡核苷酸能够通过外切核酸酶降解。 外切核酸酶降解抗性通过在寡核苷酸的5'和/或3'端掺入两个或多个氨基磷酸酯和磷酰硫氨酸和/或二硫代磷酸酯键来提供,其中氨基磷酸酯键的数目小于将干扰杂交的数目 互补的寡核苷酸链和/或当寡核苷酸与RNA杂交时会干扰RNAseH活性。