Use the Intact Mass Analysis page to create a new intact mass analysis experiment. On this page, you can enter the experiment name, load the raw data files, select a protein or oligonucleotide sequence, and select a processing method for your experiment.
You can run an intact mass analysis experiment in Manual or Automatic mode. See Processing modes: Manual vs. Automatic. This procedure describes the procedure for starting a new intact mass analysis experiment in Manual mode. Use Manual mode when you want to make changes to the processing method to determine the optimal settings before saving the parameters to a new method.
Procedure
- To open the Intact Mass Analysis page, from the BioPharma Finder home page, double-click Intact Mass Analysis in the Experiment Types area.
- The Intact Mass Analysis page opens and contains five areas: Intact Mass Analysis Definition, Load Raw Data, Result Format for Multiple Raw Files, Sequence, and Processing Method.
- In the Intact Mass Analysis Definition area, type the name of the experiment in the Experiment Name box.
- Experiment names can contain up to 50 characters, including alphanumeric, space, underscore (“_”), and period (“.”) characters.
- You can overwrite an existing experiment by entering the same experiment name. You cannot overwrite an experiment that is currently submitted to the run queue or is actively processing or canceling in the run queue.
- See Process an experiment on the Queue page (Automatic mode).
- In the Load Raw Data area, select the Select Raw Data button (“...”) to locate and load the raw data files for the experiment.
- See Select raw data files.
- If you load multiple raw data files for an experiment, you must enter a condition for each raw data file and select the reference condition for the experiment. In the Condition box, type the condition for each raw data file, separated by a space. In the Reference Condition box, select the reference condition from the drop-down menu.
- Below the Load Raw Data parameters, the application lists the raw data file names and their associated conditions.
- To change the condition assigned to a raw data file, use the drop-down menu in the Condition column to select a different condition.
- If you load multiple raw data files for an experiment, in the Result Format for Multiple Raw Files area, select either Batch or Multiconsensus.
- See Batch and multiconsensus result formats.
- You can process up to 10 raw data files in Multiconsensus mode.
- If your experiment contains a single raw data file, the Result Format for Multiple Raw Files area is inactive.
- In the table in the Sequence area, select the checkbox for one or more protein or oligonucleotide sequences to assign the sequence to the experiment.
- See Select one or more sequences.
- To run a target sequence matching experiment, you must select a sequence.
- For all other processing methods, this selection is optional.
NOTE
For intact mass analysis experiments, only protein sequences assigned to the “Intact Protein” category and oligonucleotide sequences assigned to the “Intact Deconvolution” category appear in the table.
If your sequence does not appear in the table, you can change its assigned category to “Intact Protein” or "Intact Deconvolution" using the appropriate Sequence Editor.
- In the table in the Processing Method area, select the checkbox for a processing method to assign the processing method to the experiment.
- The application provides several default processing methods for intact mass analysis experiments.
- See Default processing methods for intact mass analysis.
NOTICE
For IonTrap data, you must use a processing method with the ReSpect deconvolution algorithm. The application cannot process IonTrap data with the Xtract deconvolution algorithm.
IonTrap data acquired in centroid mode is not supported by either the ReSpect algorithm or the Xtract algorithm.
- For experiments using a processing method with the sliding windows deconvolution (source spectra) method, you can select the Enable Automatic Sliding Window Parameter Values checkbox above the table in the Processing Method area to automatically optimize the following parameters:
- In the Sliding Windows Definition area:
- •Target Avg Spectrum Width
- •Target Avg Spectrum Offset: Scan Offset and % Offset
- In the Sliding Windows Merging Parameters area:
- •Merge Tolerance
- •Merge Scheme (Legacy Merge Scheme or Improved Merge Scheme)
- •Max RT Gap
- •Min. Number of Detected Intervals
- Instead of the default values set for the processing method, the application reads the scan data from the raw data file (for an experiment using only one file) or from the first file (for an experiment using multiple files) to optimize these parameters. For more information on these automatically optimized parameters, see Source Spectra Method area parameters.
NOTE
The application does not optimize these parameter values in a custom processing method. You must use a default processing method to enable automatic sliding window parameter values.
NOTE
The Batch Processing results format and the automatic peak detection deconvolution method are not supported in Manual mode.
You must select the Multiconsensus results format and either the average over selected retention time or sliding windows deconvolution method to run an intact mass analysis in Manual mode.
- Select Manual Process.
- The application automatically transfers you to the Process and Review page where you can perform the following stepwise:
- •Set up the chromatogram
- •Select the chromatographic peaks
- •Edit the algorithm parameters to deconvolve the spectra
- •Review and report experiment results
- See Process an experiment in Manual mode.