| 摘要 |
This invention describes the use of peptide profiling to identify, characterize, and classify biological samples. In complex samples, many thousands of different peptides will be present at varying concentrations. The invention uses liqui d chromatography and similar methods to separate peptides, which are then identified and quantified using mass spectrometry. By identification it is meant that t he correct sequence of the peptide is established through comparisons with genome sequence databases, since the majority of peptides and proteins are unannotated and have no ascribed name or function. Quantification means an estimate of the absolute or relative abundance of the peptide species using mass spectrometry and relate d techniques including, but not limited to, pre- or post-experimental stable o r unstable isotope incorporation, molecular mass tagging, differential mass tagging, an d amino acid analysis.
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