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    • 37. 发明申请
    • SEQUENCE-SPECIFIC METHODS FOR HOMOGENEOUS, REAL-TIME DETECTION OF LAMP PRODUCTS
    • 序列特异性方法,用于均质,实时检测灯产品
    • US20120276538A1
    • 2012-11-01
    • US13505598
    • 2010-11-04
    • James G. Nadeau
    • James G. Nadeau
    • C12Q1/68G01N21/65G01N21/64
    • C12Q1/6865C12Q2525/307
    • Presented herein are methods and compositions for generating sequence-specific, secondary amplification products during Loop-mediated Isothermal Amplification (LAMP). Conventional LAMP produces a preponderance of high molecular weight DNA structures concatenated into self-complementary hairpins, which are not amenable to detection by routine probe-based hybridization methods, making multiplex detection of two or more targets or sequence variants in closed-tube formats extremely difficult. Provided herein, for example, are methods for generating secondary LAMP products bearing a fragment of the original target sequence embedded within low-molecular weight products that are devoid of competitive hairpin structures, the lack of which enhances probe-based detection of target sequences. These secondary products can, for example, be produced in real-time, during the LAMP process, and can provide the option of detecting multiple target sequences within a single tube using, e.g., a homogenous, real-time fluorescence format.
    • 本文提出了在环介导的等温扩增(LAMP)期间产生序列特异性二级扩增产物的方法和组合物。 常规的LAMP产生连接到自身互补发夹中的高分子量DNA结构的优势,其不适于通过常规基于探针的杂交方法的检测,使得封闭管形式中的两个或更多个目标或序列变体的多重检测非常困难 。 例如,本文提供的是产生具有嵌入低分子量产物中的原始靶序列的片段的次级LAMP产物的方法,所述片段不含有竞争力的发夹结构,其缺乏可增强靶序列的基于探针的检测。 这些次要产物可以例如在LAMP过程期间实时产生,并且可以提供使用例如均匀的实时荧光格式在单个管内检测多个靶序列的选项。
    • 39. 发明授权
    • Detection of nucleic acids by strand displacement
    • 通过链置换检测核酸
    • US06261784B1
    • 2001-07-17
    • US09599164
    • 2000-06-22
    • James G. NadeauHelen V. HsiehJ. Bruce PitnerC. Preston Linn
    • James G. NadeauHelen V. HsiehJ. Bruce PitnerC. Preston Linn
    • C12Q168
    • C12Q1/6818C12Q2537/1373C12Q2531/143C12Q2531/119
    • Detector nucleic acids are employed for detection of nucleic acid target sequences by fluorescence quenching mechanisms. The detector nucleic acid comprises at least two oligonucleotides and is partially single-stranded and partially double-stranded. One of the two dyes of a donor/acceptor dye pair is linked to the first oligonucleotide and the other is linked to a second oligonucleotide such that they are in close spatial proximity when the first and second oligonucleotides are base-paired and donor fluorescence is quenched. A single second oligonucleotide may be hybridized to the first oligonucleotide or multiple second oligonucleotides may be hybridized to the first oligonucleotide and to each other, forming a junction structure comprising multiple donor/acceptor dye pairs. The detector oligonucleotide retains its partially single-stranded and partially double-stranded conformation in the absence of target. In the presence of target, however, the second oligonucleotide(s) of the detector nucleic acid is/are completely or partially displaced from the first, increasing the distance between the donor and acceptor dyes and causing a change in fluorescence which may be detected as an indication of the presence of the target sequence.
    • 检测器核酸用于通过荧光猝灭机制检测核酸靶序列。 检测器核酸包含至少两个寡核苷酸并且是部分单链和部分双链的。 供体/受体染料对的两种染料之一与第一寡核苷酸连接,另一种与第二寡核苷酸连接,使得当第一和第二寡核苷酸是碱基配对并且供体荧光淬灭时它们处于紧密的空间接近 。 单个第二寡核苷酸可以与第一寡核苷酸杂交,或者多个第二寡核苷酸可以与第一寡核苷酸和彼此杂交,形成包含多个供体/受体染料对的连接结构。 检测器寡核苷酸在不存在目标时保留其部分单链和部分双链构象。 然而,在靶存在下,检测器核酸的第二寡核苷酸与第一寡核苷酸完全或部分位移,从而增加供体和受体染料之间的距离并引起荧光的变化,其可被检测为 指示靶序列的存在。
    • 40. 发明授权
    • Detection of nucleic acids by fluorescence quenching
    • 通过荧光猝灭检测核酸
    • US6130047A
    • 2000-10-10
    • US235583
    • 1999-01-22
    • James G. NadeauHelen V. HsiehJ. Bruce PitnerC. Preston Linn
    • James G. NadeauHelen V. HsiehJ. Bruce PitnerC. Preston Linn
    • G01N21/64C07H21/00C12N15/09C12Q1/68G01N33/542G01N33/566C07H21/04C12P19/34
    • C12Q1/6818
    • Detector nucleic acids are employed for detection of nucleic acid target sequences by fluorescence quenching mechanisms. The detector nucleic acid comprises at least two oligonucleotides and is partially single-stranded and partially double-stranded. One of the two dyes of a donor/acceptor dye pair is linked to the first oligonucleotide and the other is linked to a second oligonucleotide such that they are in close spatial proximity when the first and second oligonucleotides are base-paired and donor fluorescence is quenched. A single second oligonucleotide may be hybridized to the first oligonucleotide or multiple second oligonucleotides may be hybridized to the first oligonucleotide and to each other, forming a junction structure comprising multiple donor/acceptor dye pairs. The detector oligonucleotide retains its partially single-stranded and partially double-stranded conformation in the absence of target. In the presence of target, however, the second oligonucleotide(s) of the detector nucleic acid is/are completely or partially displaced from the first, increasing the distance between the donor and acceptor dyes and causing a change in fluorescence which may be detected as an indication of the presence of the target sequence.
    • 检测器核酸用于通过荧光猝灭机制检测核酸靶序列。 检测器核酸包含至少两个寡核苷酸并且是部分单链和部分双链的。 供体/受体染料对的两种染料之一与第一寡核苷酸连接,另一种与第二寡核苷酸连接,使得当第一和第二寡核苷酸是碱基配对并且供体荧光淬灭时它们处于紧密的空间接近 。 单个第二寡核苷酸可以与第一寡核苷酸杂交,或者多个第二寡核苷酸可以与第一寡核苷酸和彼此杂交,形成包含多个供体/受体染料对的连接结构。 检测器寡核苷酸在不存在目标时保留其部分单链和部分双链构象。 然而,在靶存在下,检测器核酸的第二寡核苷酸与第一寡核苷酸完全或部分位移,从而增加供体和受体染料之间的距离并引起荧光的变化,其可被检测为 指示靶序列的存在。