Commands:
View > Precursors
Window > Residue Library
View > Filter
File > Export > Precursors...


A precursor view shows all fragmented m/z ions of the chromatogram and gives access to the fragment spectra.

A Precursor view can be generated with the command View > Precursors if the main view is related to a chromatogram with fragment spectra. The Precursor view gives access to all fragment spectra.

Activities:
  • Displaying a fragment spectrum: changing the selection in the precursor table
  • Displaying a fragment spectrum with its identified amino acid sequence: changing the selection in the precursor table to a blue colored precursor
  • Filtering the precursors: the command View > Filter
    • for a data dependent analysis allows to limit the display to identified precursors or to fragment spectra whose summed intensity beyond the m/z value (selected precursor + 1) is larger or smaller a specified value
    • for an all ion fragmentation analysis allows to display exclusively the fragment spectra acquired for a specific precursor selection window
Exporting precursors: the command File > Export > Precursors... exports the currently displayed precursors as a tab separated list.
The precursor view can be linked to other chromatograms using the link symbol to display their fragment spectra. It can be linked to a chromatogram map for a general overview.