LCMS Features page columns

Column

Description

# Isotopes

Displays the number of isotopic peaks matched for this feature.

Apex RT [min]

Displays the retention time at the apex of the feature.

Area

Displays the area of the largest theoretical contained LCMS peak.

Charge

Displays the charge state of the precursor ion associated with the feature.

Checked

Indicates whether the item is selected.

File ID

Displays a short identifier of the input file in which the application detected the feature.

Intensity

Displays the peak height of the largest theoretical contained LCMS peak.

Left RT [min]

Displays the lower retention time boundary of the feature.

m/z [Da]

Displays the monoisotopic m/z of the feature.

Quan Info

Displays the status of the validity of this quantification result for the quantification. The possible values are:

(For precursor ion quantification)

  • No Quan Values: Indicates that the feature area is 0.
  • Rejected by Method: Indicates that the peptide was not used in the quantification.
  • Shared: Indicates that different PSMs are associated with a feature.

(For reporter ion quantification)

  • No Quan Values: Indicates that the feature area is 0.
  • Rejected: Indicates that the peptide was not used in the quantification.
  • Shared: Indicates that different PSMs are associated with a feature.

Quan Info Details

Displays the reason for rejection when the status in the Quan Info column is Rejected by Method. The possible reasons are:

  • Single Peak: Indicates that the feature consists of only a single
    LC/MS peak and that single peak features should not be used.
  • Missing Replicates: Indicates that not enough replicate files have detected features.

Right RT [min]

Displays the upper retention time boundary of the feature.

Score

Displays the feature score for the feature.

Score Deviations

Displays the score deviation for the feature.

Workflow ID

Displays the identification of the workflow that the application detected the feature in.