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    • 6. 发明授权
    • Low frequency modulation sensors using nanosecond fluorophores
    • 低频调制传感器使用纳秒级荧光团
    • US06806089B1
    • 2004-10-19
    • US09786627
    • 2001-04-17
    • Joseph R. LakowiczIgnacy Gryczynski
    • Joseph R. LakowiczIgnacy Gryczynski
    • G01N2164
    • G01N21/6408G01N21/6428G01N2021/6415Y10T436/144444
    • Described is a new approach to fluorescence sensing based on a mixture of fluorophores, one of which is sensitive to the desired analyte. If a long lifetime analyte-insensitive fluorophore is mixed with a short lifetime analyte-sensitive fluorophore, the modulation of the emission at conveniently low frequencies becomes equal to the fractional fluorescence intensity of the sensing fluorophore. Under these conditions the modulation can be used to determine the analyte concentration. This can be used with any fluorophore which changes intensity in response to analyte, and does not require the sensing fluorophore to display a change in lifetime. The feasibility of modulation-based sensing was demonstrated using mixtures of 6-carboxyfluorescein and [Ru2,2′(bipyridyl)3]2+ as a pH sensor and of the calcium probe Fluo-3 and [Ru2,2′(bipyridyl)3]2+ as a calcium sensor.
    • 描述了基于荧光团的混合物的荧光感测的新方法,其中一种对所需分析物敏感。 如果长寿命分析物不敏感的荧光团与短寿命分析物敏感的荧光团混合,则在方便的低频率下的发射调制变得等于感测荧光团的分数荧光强度。 在这些条件下,调节可用于确定分析物浓度。 这可以与响应于分析物改变强度的任何荧光团一起使用,并且不需要感测荧光团显示寿命的变化。 使用6-羧基荧光素和[Ru2,2'(联吡啶基)3] 2+作为pH传感器和钙探针Fluo-3和[Ru2,2'(联吡啶基)的混合物来证明基于调制的感测的可行性 )3] 2+作为钙传感器。
    • 7. 发明授权
    • Method for determining a base sequence of a nucleotide strand
    • 确定核苷酸链的碱基序列的方法
    • US06432637B1
    • 2002-08-13
    • US08990539
    • 1997-12-15
    • Joseph R. Lakowicz
    • Joseph R. Lakowicz
    • C12Q168
    • C12Q1/6869C07H19/14C07H21/00C12Q2563/137C12Q2535/125C12Q2535/101
    • A method for determining a base sequence of a nucleotide strand in a sample utilizes a probe including a fluorescent metal-ligand complex coupled to a first oligonucleotide having a sequence complementary to the first fragment of the strand. The first mixture is exposed to an exciting amount of radiation, and the fluorescence of the metal-ligand complex is detected. The first base sequence of the first fragment is identified based on fluorescence of the metal ligand complex. A second probe differing from the first by at least one base is provided. A second base of the second fragment is identified based on the fluorescence of the metal-ligand complex of the second probe. The second base sequence is compared to the first base sequence to identify a difference between the first and second sequences to determine a base sequence of the nucleotide strand.
    • 用于测定样品中核苷酸链的碱基序列的方法利用包含与具有与该链的第一片段互补的序列的第一寡核苷酸偶联的荧光金属 - 配体复合物的探针。 将第一混合物暴露于激发量的辐射,并检测金属 - 配体络合物的荧光。 基于金属配体络合物的荧光来鉴定第一片段的第一碱基序列。 提供了与第一至少一个基座不同的第二探针。 基于第二探针的金属 - 配体复合物的荧光来鉴定第二片段的第二碱基。 将第二碱基序列与第一碱基序列进行比较以鉴定第一和第二序列之间的差异,以确定核苷酸链的碱基序列。