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    • 13. 发明申请
    • PROTEIN IDENTIFICATION FROM PROTEIN PRODUCT ION SPECTRA
    • 蛋白质鉴定蛋白产品离子谱
    • WO2003098190A2
    • 2003-11-27
    • PCT/US2003/016029
    • 2003-05-20
    • PURDUE RESEARCH FOUNDATIONREID, Gavin, E.HOGAN, Jason, M.MCLUCKEY, Scott, A.
    • REID, Gavin, E.HOGAN, Jason, M.MCLUCKEY, Scott, A.
    • G01N
    • G01N33/6848H01J49/00
    • Mass spectrometry is used to identify a protein of interest. The protein is first ionized then fragmented into protein product ions. Masses of the observed product ions are compared to product ion masses calculated in silico for database protein sequences to identify product ion matches within a predetermined mass tolerance. An algorithm that weights the product ion to matches based upon one or more factors such as product ion abundance, favored cleavage sites, product ion type, precursor ion charge state and polarity is used to score the possible matches to database proteins in order to identify the protein of interest. The invention represents a "top down" approach and is particularly well-suited for identification of a protein in a complex mixture.
    • 质谱用于鉴定感兴趣的蛋白质。 蛋白质首先被电离,然后被分解成蛋白质产物离子。 将观察到的产物离子的质量与对于数据库蛋白质序列计算的产物离子质量进行比较,以在预定质量公差内鉴定产物离子匹配。 使用基于一个或多个因素(例如产物离子丰度,有利的切割位点,产物离子类型,前体离子电荷状态和极性)对产物离子进行匹配的算法来评估与数据库蛋白质的可能匹配,以便鉴定 感兴趣的蛋白质 本发明代表“自上而下”的方法,并且特别适合于鉴定复杂混合物中的蛋白质。