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    • 1. 发明公开
    • CHEMICAL LIGATION OF TEMPLATE-DIRECTED OLIGONUCLEOTIDES
    • 模板寡核苷酸的化学结合
    • EP0830363A1
    • 1998-03-25
    • EP96915480.0
    • 1996-05-03
    • NORTHWESTERN UNIVERSITY
    • LETSINGER, Robert, L.GRYAZNOV, Serge M.
    • C07H21C12Q1
    • C07H21/00C12Q1/6813C12Q1/6827C12Q2523/101C12Q2523/109C12Q2561/125C12Q2565/401
    • A method of increasing oligonucleotide selectivity in recognition of nucleic acids is disclosed, the method including the steps of disposing in aqueous solution a first oligomer having high selectivity for a target polynucleotide and a second oligomer having high affinity for an adjacent segment of the target polynucleotide. The oligomers include first and second reactive groups capable of spontaneously and irreversibly forming stable covalent bonds between the oligomers in absence of added chemical reagents or enzymes. A method for hybridizing nucleic acids includes the steps of reversibly binding a first oligomer to a target oligo- or polynucleotide including base units complementary to base units of the oligonucleotide, reversibly binding a second oligomer to the target oligo- or polynucleotide including base units complementary to base units of the oligonucleotide adjacent to the first oligomer, and wherein one of the oligomers includes a nucleotide having a first reactive group proximate to a nucleotide of the other oligomer which includes a second reactive group capable of spontaneously forming a covalent bond with the first reactive group. The method further includes the steps of irreversibly covalently joining the oligomers together through the first and the second reactive groups having been brought in proximity to each other upon binding of the oligonucleotides on the target polynucleotide in the absence of added reagent or enzyme, dissociating the joined first and second oligomers from the target polynucleotide, and removing the target polynucleotide.
    • 公开了增加识别核酸的寡核苷酸选择性的方法,所述方法包括以下步骤:将对靶多核苷酸具有高选择性的第一寡聚物和对靶多核苷酸的相邻区段具有高亲和力的第二寡聚物置于水溶液中。 低聚物包括第一和第二反应性基团,其能够在不添加化学试剂或酶的情况下自发地和不可逆地在低聚物之间形成稳定的共价键。 用于杂交核酸的方法包括以下步骤:将第一寡聚物可逆结合至包含与寡核苷酸的碱基单元互补的碱基单元的目标寡聚核苷酸或多聚核苷酸,将第二寡聚物可逆地结合至目标寡聚核苷酸或多聚核苷酸, 寡核苷酸的与第一寡聚物相邻的碱基单元,并且其中一个寡聚物包括具有第一反应基团的核苷酸,所述第一反应基团邻近另一寡聚物的核苷酸,所述另一寡聚物包含能够与第一反应物自发形成共价键的第二反应基团 组。 该方法进一步包括以下步骤:通过第一和第二反应性基团将寡聚体不可逆地共价连接在一起,所述第一和第二反应性基团在寡核苷酸在不添加试剂或酶的情况下与靶多核苷酸结合后彼此接近,分离接合体 来自靶多核苷酸的第一和第二寡聚物,并去除靶多核苷酸。