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    • 91. 发明申请
    • Simple method of biologically evaluating natural and artificial chemicals by using dna injury index and apparatus therefor
    • 通过使用dna损伤指数及其设备对天然和人造化学品进行生物评估的简单方法
    • US20030186260A1
    • 2003-10-02
    • US10203553
    • 2002-08-28
    • Atsushi Takaki
    • C12Q001/68
    • G01N33/52C12Q1/025C12Q1/68G01N33/5014C12Q2525/117C12Q2523/113C12Q2523/313
    • A biological evaluation method for rational and simply evaluating biological harmfulness or usefulness of a great number of natural and artificial chemicals, foods, etc. This method comprises adding a known amount of 2null-deoxyguanosine (dG) to a solution containing a test substance (drug, pesticide, functional food, etc.), optionally applying UV light and/or adding active oxygen generator, then quantifying 8-hydroxy-2null-deoxyguanosine (8OHdG) in the solution, and evaluating the toxicity or usefulness of the test substance according to the 8OhdG content (a higher 8OhdG content indicates a higher harmfulness of the test substance while a lower 8OhdG content indicates a lower harmfulness or an usefulness thereof). The invention also provide an apparatus for advantageously performing said biological evaluation method and an antioxidant preservative solution to be used in this apparatus.
    • 一种用于合理,简单地评估大量天然和人造化学品,食品等的生物有害性或有用性的生物学评估方法。该方法包括将已知量的2'-脱氧鸟苷(dG)加入到含有测试物质的溶液 药物,农药,功能性食品等),任选地应用UV光和/或添加活性氧发生剂,然后定量溶液中的8-羟基-2'-脱氧鸟苷(8OHdG),并评估测试物质的毒性或有用性 根据8OhdG含量(较高的8 OhdG含量表示测试物质的较高的有害性,而较低的8 OhdG含量表示较低的有害性或其有用性)。 本发明还提供了用于有利地进行所述生物学评价方法的装置和用于该装置中的抗氧化防腐剂溶液。
    • 97. 发明申请
    • Primer-mediated polynucleotide synthesis and manipulation techniques
    • 引物介导的多核苷酸合成和操作技术
    • US20010031483A1
    • 2001-10-18
    • US09795965
    • 2001-02-28
    • Stratagene
    • Joseph A. SorgeKerstien A. Padgett
    • C12P001/00C07K001/00C07K014/00C07K017/00C12Q001/68
    • C12N15/66C12N15/10C12Q1/686C12Q2525/131C12Q2525/117
    • The invention provides improved techniques for conveniently manipulating polynucleotides of interest without the need to rely upon the presence of naturally occurring restriction sites. Additionally, using the methods and primers of the invention, one may synthesize a polynucleotide of interest in a form which is easily and directionally cloned into a DNA sequence of choice without necessarily introducing extraneous nucleotides in the final polynucleotide product. The methods of the invention employ releasable primers that comprise a recognition site for a releasing enzyme joined to a region for annealing to the polynucleotide template of interest. Polynucleotide sequences of interest are synthesized using one or more synthesis primers, wherein at least one of the primers is a releasable primer. After synthesis, the synthesis product is cleaved by a releasing enzyme. In a preferred embodiment of the invention, inhibitory base analogs are incorporated in the synthesis product to protect against the formation of unwanted internal cleavage products. In another embodiment of the invention, at least one of the releasable primers is bound to an immobilizing solid phase support so as to produce immobilized synthesis products that may be conveniently released by a releasing enzyme. Another aspect of the invention is to provide releasable primers and kits for performing the subject methods. Typically, such kits may comprise a releasing enzyme and one or more reagents for performing a polynucleotide synthesis reaction, preferably a cyclic amplification reaction.
    • 本发明提供了用于方便地操作感兴趣的多核苷酸的改进的技术,而不需要依赖天然存在的限制性位点的存在。 另外,使用本发明的方法和引物,人们可以以容易且定向克隆到选择的DNA序列中的形式合成感兴趣的多核苷酸,而不必在最终多核苷酸产物中引入外来核苷酸。 本发明的方法使用可释放的引物,其包含连接到用于退火的感兴趣的多核苷酸模板的区域的释放酶的识别位点。 使用一种或多种合成引物合成感兴趣的多核苷酸序列,其中至少一种引物是可释放引物。 合成后,合成产物被释放酶切割。 在本发明的优选实施方案中,将抑制性碱基类似物掺入合成产物中以防止形成不需要的内部裂解产物。 在本发明的另一个实施方案中,至少一个可释放的引物与固定的固相载体结合,以产生可通过释放酶方便地释放的固定的合成产物。 本发明的另一方面是提供用于实施本发明方法的可释放的底漆和试剂盒。 通常,这样的试剂盒可以包含释放酶和用于进行多核苷酸合成反应的一种或多种试剂,优选循环扩增反应。
    • 99. 发明授权
    • Method for characterizing nucleic acid molecules
    • 表征核酸分子的方法
    • US06190865B1
    • 2001-02-20
    • US08534799
    • 1995-09-27
    • Jerome J. JendrisakLeslie M. HoffmanRobert E. Smith
    • Jerome J. JendrisakLeslie M. HoffmanRobert E. Smith
    • C12Q168
    • C12Q1/6869C12Q1/6848C12Q2525/119C12Q2525/117C12Q2521/531C12Q2525/101
    • A method of characterizing a nucleic acid molecule is disclosed. The method comprises synthesizing DNA in the presence of a reaction mixture comprising a nucleic acid template, a primer molecule, an enzyme that extends the primer so that a DNA molecule may be synthesized, four canonical deoxynucleoside triphosphates and at least one non-canonical deoxynucleoside triphosphate. The non-canonical deoxynucleoside triphosphate is incorporated into the synthesized DNA in place of a portion of only one canonical deoxynucleoside triphosphate. The synthesized DNA is treated with an N-glycosylase that excises a base portion of the non-canonical deoxynucleoside triphosphate from the synthesized DNA. The DNA is then treated in such a manner that the phosphodiester backbone of the DNA is broken at the abasic site, thus creating at least two DNA fragments. The fragments are separated according to size.
    • 公开了表征核酸分子的方法。 该方法包括在包含核酸模板,引物分子,延伸引物以使得可以合成DNA分子的酶的反应混合物存在下合成DNA,四种典型脱氧核苷三磷酸和至少一种非标准脱氧核苷三磷酸 。 将非标准脱氧核苷三磷酸引入合成的DNA中代替仅一个典型脱氧核苷三磷酸的一部分。 合成的DNA用从合成的DNA中切除非标准脱氧核苷三磷酸的碱基的N-糖基化酶处理。 然后以这样的方式处理DNA,使得DNA的磷酸二酯骨架在脱碱基位点断裂,从而产生至少两个DNA片段。 碎片根据大小分离。