| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid a peptide ion derived from a protein that has already been measured and that is expressed in great quantities as a tandem mass spectroscopy target, and to determine a peptide or the like derived from a minute amount of protein, which has heretofore been difficult to analyze as a tandem mass spectroscopy target, automatically within the real time of measurement, during the structural analysis of a protein or peptide by tandem mass spectroscopy. Ž<P>SOLUTION: Data concerning a protein that has already been measured and a peptide derived from the protein are automatically stored in an internal database. The stored data are collated with measured data with high accuracy to determine an isotope peak. In this way, the process of selecting a peptide peak that has not been measured as the target for the next tandem analysis can be performed within the real time of measurement and a redundant measurement of peptides derived from the same protein can be avoided. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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