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    • 7. 发明申请
    • AFFINITY CAPTURE OF PEPTIDES BY MICROARRAY AND RELATED METHODS
    • 微量元素的亲和性捕获及相关方法
    • WO2005007677A2
    • 2005-01-27
    • PCT/US2004022135
    • 2004-07-09
    • INST SYSTEMS BIOLOGYAEBERSOLD RUDOLF HZHANG HUI
    • AEBERSOLD RUDOLF HZHANG HUI
    • C07K20060101C12Q1/37G01N33/53G01N33/68C07K
    • G01N33/6848C12Q1/37G01N33/6845
    • The invention provides methods of detecting polypeptides in a sample. The method can include the steps of cleaving polypeptides in a test sample to generate peptides; adding a predetermined amount of isotopically labeled peptide standards to the cleaved test sample, wherein the peptide standards correspond to peptides cleaved with the same reagent used to cleave the test sample; contacting the cleaved test sample containing peptide standards with an array of immobilized binding agents specific for the peptide standards; washing the array to remove unbound peptides, thereby retaining affinity captured sample peptides and standard peptides; analyzing the affinity captured peptides using mass spectrometry; and determining the presence of bound test peptides and standard peptides. The method can further include the step of quantifying the amount of the test peptides by comparing the ratio of test peptide to corresponding standard peptide.
    • 本发明提供了检测样品中多肽的方法。 该方法可以包括在测试样品中切割多肽以产生肽的步骤; 向切割的测试样品中加入预定量的同位素标记的肽标准物,其中肽标准物对应于用用于切割测试样品的相同试剂切割的肽; 使含有肽标准物的切割的测试样品与肽标准物特异性的固定化结合剂阵列接触; 洗涤阵列以除去未结合的肽,从而保留亲和力捕获的样品肽和标准肽; 使用质谱分析亲和力捕获的肽; 并确定结合的测试肽和标准肽的存在。 该方法还可以包括通过比较测试肽与相应的标准肽的比例来量化测试肽的量的步骤。