Data Matching

Main purpose of modules like Protein Digest, Peptide Fragmentation and Compare Peaklists is the interpretation of measured data, i.e. matching theoretically generated data to the real experiment or, in case of Compare Peaklists module, multiple peaklists comparison. Likewise Check Differences module compares differences between peaks with the list of amino acids, dipeptides, modifications and/or specified value. Beside simple Match Data tool, there are some additional functions to show Match Info and Annotate Peaklist.

Tolerance settings

The most important part of data matching is proper set of tolerance. To set Tolerance use [Config → Tolerance…] icon. In the dialog you can specify the value and units (Da, ppm, %). Current tolerance settings is always shown in the application statusbar.

tolerance dialog

Tolerance dialog.

Data matching

To match the data from current module to the peaklist use Match Data [Matching → Match Data] icon. Matched values are highlighted and, if set in application preferences, Match Info dialog is shown.

Match info

Some basic information about last data matching can be seen in Match Info dialog [Matching → Match Info] icon. The error distribution plot can be easily used to check data calibration.

Match Info dialog

Match Info dialog.

Annotate peaklist

Matched peaks can be easily annotated according to the matched data. To annotate your peaklist choose Annotate Peaklist [Matching → Annotate Peaklist] icon.