The Feature Group page reports a list of all features individually measured from all data files. Use the Feature Group page to see the mass and abundance of each detected feature as well as additional features.

Figure Feature Group page columns

The following table lists the Feature Group page columns.

Table Feature Group page columns

Column

Description

File ID

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

Apex RT [min]

The retention time (RT) at which the abundance is greatest for the feature.

Area

The measured peak area for a feature.

Intensity

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

# LCMS Features

The number of LC/MS features found within your defined mass and retention time thresholds. This value is usually one.

When many feature groups contain more than 2 or 3 LC/MS features, consider tightening the RT and Mass tolerance in the feature detector node. For information on feature detector nodes and their parameters, see Feature Detector nodes.

Scan Range

The scan numbers where the feature was detected.

RT Range

The retention time range when the feature was detected.

Mass (Da)

The detected mass of the feature.

Quan Info

The column indicates if the feature is shared or unique.

  • Shared indicates features mapping to multiple PrSMs
  • Empty column (indicating unique) indicates that the feature maps to 1 or 0 PrSMs

#PrSMs

The number of PrSMs.