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    • 4. 发明授权
    • Process and nucleic acid construct for producing reagent complexes
useful in determining target nucleotide sequences
    • 用于产生可用于测定靶核苷酸序列的试剂复合物的方法和核酸构建体
    • US5268266A
    • 1993-12-07
    • US938201
    • 1986-06-09
    • Edward F. FritschMary Collins
    • Edward F. FritschMary Collins
    • C12Q1/68C07H21/00C07H21/04
    • C12Q1/6827C12Q1/6813C12Q1/6823C12Q1/683C12Q1/6832C12Q1/6876
    • A nucleic acid construct useful in preparing reagents for determining target nucleotide sequences in the nucleic acid of a biological sample, the construct having in its single-stranded form:(a) a target binding region substantially complementary to the target nucleotide sequence, and(b) a signal strand pairing segment bound in the construct by complementary base pairing to a portion of the target binding region;a second portion of the target binding region being single-stranded; andthe target binding region and signal strand pairing segment being covalently linked by a phosphate/sugar backbone.A replicable nucleic acid having an origin of replication and two half-restriction sites capable of forming a restriction site can be treated with a restriction enzyme to form a length of nucleic acid containing the target binding region and the signal strand pairing segment. Subsequent labeling of the construct and various optional cleavage and derivation steps can convert the construct to a reagent complex.
    • PCT No.PCT / US86 / 00742 Sec。 371日期1986年6月9日第 102(e)日期1986年6月9日PCT提交1986年4月11日PCT公布。 公开号WO86 / 06412 日期:1986年11月6日。一种用于制备用于测定生物样品核酸中的靶核苷酸序列的试剂的核酸构建体,所述构建体具有单链形式:(a)与 靶核苷酸序列,和(b)通过与靶结合区域的一部分的互补碱基配对结合在构建体中的信号链配对区段; 目标结合区域的第二部分是单链的; 并且靶结合区和信号链配对片段由磷酸/糖主链共价连接。 可以用限制酶处理具有复制起点的复制核酸和两个能够形成限制性位点的半限制性位点,以形成一定长度的含有靶结合区和信号链配对片段的核酸。 随后标记构建体和各种任选的切割和衍生步骤可将构建体转化为试剂复合物。
    • 5. 发明授权
    • Assay, reagent and kit employing nucleic acid strand displacement and
restriction endonuclease cleavage
    • 测定,试剂和试剂盒采用核酸链置换和限制性内切酶切割
    • US4725537A
    • 1988-02-16
    • US777657
    • 1985-09-19
    • Edward F. FritschJon I. Williams
    • Edward F. FritschJon I. Williams
    • C12Q1/68G01N33/53G01N33/566
    • C12Q1/6823C12Q1/683Y10S435/81
    • A target nucleotide sequence having a half-restriction site is determined in the nucleic acid of a biological sample. It is contacted with a reagent complex of:(i) a labeled probe polynucleotide containing a target binding region which is substantially complementary to the target nucleotide sequence and which contains a unique half-restriction site completely complementary to the half-restriction site of the target nucleotide sequence; and(ii) a second polynucleotide hybridized to the labeled probe polynucleotide in at least a portion of the target binding region, the portion including the unique half-restriction site of the target binding region;The second polynucleotide contains at least one mismatched or unpaired nucleotide opposite to the unique half-restriction site of the labeled probe polynucleotide, whereby a restriction enzyme specific for the unique restriction site will not cleave the reagent complex. The target nucleotide sequence, if present, displaces the second polynucleotide from the target nucleotide region and forms the unique restriction site in double-stranded form. The labeled probe polynucleotide is then cleaved at the unique restriction site in double-stranded form to form labeled cleavage fragment, which is detected.
    • 在生物样品的核酸中测定具有半限制性位点的靶核苷酸序列。 (i)含有一个靶结合区是与靶核苷酸序列基本互补,并且其中包含一个独特的半限制性位点到目标的半限制性位点完全互补的标记探针的多核苷酸:其与的试剂复合物接触 核苷酸序列; 和(ii)在靶结合区域的至少一部分中与标记的探针多核苷酸杂交的第二个多核苷酸,该部分包括靶结合区域的唯一半限制性位点; 第二个多核苷酸含有与标记的探针多核苷酸的唯一半限制性位点相对的至少一个错配或非配对核苷酸,由此对于唯一限制性位点特异的限制酶不会切割试剂复合物。 靶核苷酸序列(如果存在的话)将第二个多核苷酸从靶核苷酸区置换,并以双链形式形成唯一的限制性位点。 然后将标记的探针多核苷酸以唯一的限制性位点以双链形式切割,以形成标记的切割片段,其被检测。