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    • 2. 发明授权
    • Assay procedure using fluorogenic tracers
    • 使用荧光示踪剂的测定程序
    • US06576419B1
    • 2003-06-10
    • US08891114
    • 1997-07-10
    • Ai-Ping WeiJames N. Herron
    • Ai-Ping WeiJames N. Herron
    • C12Q108
    • G01N33/582C12Q1/6818
    • Fluorescent energy transfer dyes capable of moving between a more stacked configuration to exhibit fluorescent quenching and a more spaced configuration to exhibit fluorescence can be conjugated to a peptide epitope or nucleic acid for use in the detection of an unknown antibody in bulk solution. The resulting labeled peptide reagent can be used in an immunoassay procedure by placing it in bulk solution along with the unknown antibody to be detected. When the antibody binds to the peptide epitope, the pair of dyes carried by the peptide epitope will have their configuration altered from a stacked to an unstacked configuration and will exhibit a fluorescent increase in response thereto.
    • 能够在更叠层的配置之间移动以展现荧光猝灭和更间隔的配置以显示荧光的荧光能量转移染料可以缀合到肽表位或核酸上,以用于检测本体溶液中的未知抗体。 所得标记的肽试剂可以在免疫测定程序中使用,将其与待检测的未知抗体一起放入本体溶液中。 当抗体与肽表位结合时,由肽表位携带的一对染料将具有从堆叠到未堆叠构型的改变,并且对其反应将呈现荧光增加。
    • 3. 发明授权
    • Compositions and kits for fluorescence polarization assay of large molecules
    • 用于大分子荧光偏振测定的组合物和试剂盒
    • US06632613B1
    • 2003-10-14
    • US08483500
    • 1995-06-07
    • Ai-Ping WeiJames N. Herron
    • Ai-Ping WeiJames N. Herron
    • G01N3353
    • G01N21/6428C07K14/59C12Q1/6818G01N21/6445G01N33/542G01N33/54373G01N33/582G01N2021/6441Y10S435/975
    • An improved oligopeptide composition for use in a fluorescent polarization immunoassay for a high molecular weight analyte is disclosed, along with a kit and a method using the composition. The composition comprises an oligopeptide selected by a screening procedure in which a plurality of different oligopeptides having respective amino acid sequences that represent sequential overlapping segments of the analyte amino acid sequence, and a fluorescent label bound thereto. In a preferred embodiment, the oligopeptide has an amino acid sequence which does not form internal disulfide bridges. Such a preferred oligopeptide will generally have no more than one cysteine residue. In a further preferred embodiment, the fluorescent label is tetramethylrhodamine or a cyanine dye. The kit may be packaged with instructions directing a user to prepare an assay solution containing the monoclonal antibody and the oligopeptide in certain respective concentrations. The composition, method and kit are preferably constructed to detect nanomolar concentrations of the analyte.
    • 公开了用于高分子量分析物的荧光偏振免疫测定法的改进的寡肽组合物以及试剂盒和使用该组合物的方法。 该组合物包含通过筛选方法选择的寡肽,其中多个具有代表分析物氨基酸序列的顺序重叠片段的氨基酸序列的不同寡肽和与其结合的荧光标记。 在优选的实施方案中,寡肽具有不形成内部二硫桥的氨基酸序列。 这种优选的寡肽通常具有不超过一个半胱氨酸残基。 在另一优选实施方案中,荧光标记是四甲基罗丹明或花青染料。 试剂盒可以包装,指示用户在某些相应浓度下制备含有单克隆抗体和寡肽的测定溶液。 组合物,方法和试剂盒优选构建成检测纳摩尔浓度的分析物
    • 4. 发明授权
    • Method of determining extinction coefficient of fluorescent dye and
protein concentration of dye-protein conjugate
    • 确定荧光染料消光系数和染料 - 蛋白质结合蛋白浓度的方法
    • US5245551A
    • 1993-09-14
    • US683145
    • 1991-04-10
    • James N. HerronAi-Ping Wei
    • James N. HerronAi-Ping Wei
    • G01N21/64G01N33/68
    • G01N33/68G01N21/64G01N2201/129
    • The extinction coefficient of fluorescent dyes in donor-acceptor energy transfer processes is determined for dye-protein conjugates by forming short polypeptide fragment-dye conjugates and measuring the change in ultraviolet light absorbance of the conjugates with changing concentration. The protein concentration is determined by comparing the absorption spectrum of a conjugate of donor dye, acceptor dye, and protein with the individual components thereof using a multiple linear regression technique based on the following model:A.sub.p-d =.alpha..multidot.A.sub.p +.beta..multidot.A.sub.d +.epsilon.where, A.sub.p-d, A.sub.p, A.sub.d are the absorption spectra of the dye-protein conjugate, the protein alone, and the dye-polypeptide compound, respectively, .alpha., .beta. are the regression coefficients to be determined, and .epsilon. is the error term.
    • 通过形成短的多肽片段 - 染料缀合物并测量缀合物的紫外光吸光度随着浓度变化的变化,确定了染料 - 蛋白质缀合物中荧光染料在供体 - 受体能量转移过程中的消光系数。 通过使用基于以下模型的多元线性回归技术比较供体染料,受体染料和蛋白质的缀合物与其各个组分的吸收光谱来确定蛋白质浓度:Ap-d =α×ΔP+β×Ad +ε,其中, Ap-d,Ap,Ad分别是染料 - 蛋白质缀合物,单独的蛋白质和染料 - 多肽化合物的吸收光谱,α,β是要确定的回归系数,ε是误差项。
    • 5. 发明授权
    • Immunoassay procedure utilizing fluorogenic tracer antigens
    • 使用荧光示踪剂抗原的免疫测定方法
    • US06482655B1
    • 2002-11-19
    • US08096338
    • 1993-07-23
    • Ai-Ping WeiJames N. Herron
    • Ai-Ping WeiJames N. Herron
    • G01N3353
    • G01N33/582C12Q1/6818Y10S436/80Y10S436/805
    • Disclosed are fluorescent energy transfer dyes which are capable of moving between a more stacked configuration to exhibit fluorescent quenching and a more spaced configuration to exhibit fluorescence can be conjugated to a peptide epitope for use in the detection of an unknown antibody in bulk solution. The resulting labeled peptide reagent can be used in an immunoassay procedure by placing it in bulk solution along with the unknown antibody to be detected. When the antibody binds to the peptide epitope, the pair of dyes carried by the peptide epitope will have their configuration altered from a stacked to an unstacked configuration and will exhibit a fluorescent increase in response thereto.
    • 公开了能够在更叠层的配置之间移动以展示荧光猝灭和更间隔的构型以显示荧光的荧光能量转移染料可以缀合到肽表位,以用于检测本体溶液中的未知抗体。 所得标记的肽试剂可以在免疫测定程序中使用,将其与待检测的未知抗体一起放入本体溶液中。 当抗体与肽表位结合时,由肽表位携带的一对染料将具有从堆叠到未堆叠构型的改变,并且对其反应将呈现荧光增加。
    • 8. 发明申请
    • Fluorogenic protease substrates based on dye-dimerization
    • 基于染料二聚化的荧光蛋白酶底物
    • US20050089946A1
    • 2005-04-28
    • US10930522
    • 2004-08-31
    • Ai-Ping WeiMichael Williams
    • Ai-Ping WeiMichael Williams
    • C07K7/06C12Q1/04C12Q1/37C12Q1/68
    • C07K7/06C12Q1/37C12Q2337/40Y02A50/451
    • A method of biological assay comprises the steps of providing an enzyme substrate comprising two fluorescence dye groups bound to a flexible peptide, the dye groups being of proximity sufficiently close so as to allow free energy attractions to draw the dyes together to essentially self-quench fluorescence of the dye groups, wherein self quenching of fluorescence of the dye groups is effected by dye dimerization or stacking, and enzymatically cleaving the peptide to release the fluorescence dye groups from dye dimerization or stacking, thereby producing an increase in fluorescence intensity. A protease substrate for use in the method of the invention is also disclosed. This invention finds use in detection and identification of microorganisms, sterilization assurance, pharmaceutical discovery, enzyme assays, immunoassays, and other biological assays.
    • 一种生物测定方法包括以下步骤:提供包含与柔性肽结合的两个荧光染料基团的酶底物,所述染料组的接近度足够接近,以便使自由能吸引力将染料一起吸收到基本上自熄灭荧光 的染料基团,其中染料基团的荧光自发淬灭通过染料二聚化或堆叠进行,并且酶切割肽以使荧光染料基团从染料二聚化或堆叠释放,从而产生荧光强度的增加。 还公开了用于本发明方法的蛋白酶底物。 本发明用于微生物的检测和鉴定,灭菌保证,药物发现,酶测定,免疫测定和其他生物测定。