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    • 4. 发明申请
    • CHEMICALLY SUBSTITUTED THERMOSENSITIVE PROBES AND COFACTORS FOR HOT START LIGATION
    • 化学取代的热敏探头和热源起始剂
    • WO2012094343A1
    • 2012-07-12
    • PCT/US2012/020109
    • 2012-01-03
    • TRILINK BIOTECHNOLOGIESLEBEDEV, AlexandreKOUKHAREVA, Inna
    • LEBEDEV, AlexandreKOUKHAREVA, Inna
    • C12Q1/68
    • C12Q1/6862C12Q1/682C12Q1/6827C12Q2527/125C12Q2527/127C12Q2525/161C12Q2537/125C12Q2537/143
    • Provided herein are methods for ligase mediated nucleic acid replication and amplification of oligo- and probes containing substituted ligase components, particularly substituted ligase cofactors, substituted oligo- and probe acceptors, substituted oligo- and probe donors, substituted adenylated oligo- and polynucleotide donor intermediates carrying thermolabile group or groups. The substituted ligase components are not active until Hot Start activation step converts them into unsubstituted or natural ligase components, which fully support ligase reaction. The described methods are readily applied to ligation-based assays, especially utilizing Ligase Chain Reaction (LCR), for detection of a nucleic acid sequence where the use of the substituted ligase components improves an overall efficiency of LCR, increase discrimination between matched and mismatched templates and reduces or eliminates appearance of false positive signal. Furthermore, the use of the substituted ligase components reduces or eliminates the false positive signal originated from the template independent and blunt-ended ligation.
    • 本文提供了连接酶介导的核酸复制和扩增含有取代的连接酶组分,特别是取代的连接酶辅因子,取代的寡核苷酸和探针受体,取代的寡核苷酸和探针供体的寡核苷酸和探针,取代的腺苷酸化寡核苷酸和多核苷酸供体中间体的方法 不耐热组或组。 取代的连接酶组分不活跃,直到热启动活化步骤将其转化为未完全支持连接酶反应的未取代或天然连接酶组分。 所描述的方法容易地应用于基于连接的测定,特别是利用连接酶链反应(LCR)检测核酸序列,其中使用取代的连接酶组分改善LCR的总体效率,增加匹配和不匹配模板之间的鉴别 并减少或消除假阳性信号的出现。 此外,使用取代的连接酶组分减少或消除了源自模板独立和平端连接的假阳性信号。