| 摘要 |
PROBLEM TO BE SOLVED: To perform high-accuracy identification even for peptide in which peptide identification by MS/MS ion search or the like with a cut part designated is difficult and post-translational modification and mutation are diverse, such as bioactive peptide.SOLUTION: A tag database construction processing part 31 makes a database of a sequence tag indicating a partial sequence, and information related to the tag to create a tag database 32 on the basis of information such as an amino acid sequence and m/z of a peak of identified peptide. When MSspectrum information obtained by actually measuring objective peptide is obtained, a sequence tag acquisition processing part 33 executes retrieval based on matching of m/z of the peak and the like, for the tag database 32, to extract the high-reliability sequence tag. A peptide identification processing part 34 performs retrieval according to a sequence tag search method taking post-translational modification and mutation into consideration on the basis of the amino acid sequence of the sequence tag, m/z of a precursor ion, and the like to identify the peptide. |
