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aLFQ (version 1.0)

ALF: Generate ALF report

Description

Estimation of Absolute Protein Quantities of Unlabeled Samples by Targeted Mass Spectrometry.

Usage

## S3 method for class 'default':
ALF(data, report_filename="ALF_report.pdf",prediction_filename="ALF_prediction.csv", 
peptide_method = "top", peptide_topx = c(1,2,3,4,5,6), peptide_strictness = "loose",
peptide_summary = "sum", transition_topx= c(1,2,3,4,5,6), transition_strictness = "loose",
transition_summary = "sum", cval_method = "boot", cval_mcx = 1000,
combine_precursors = TRUE, ...)

Arguments

data
a mandatory data frame containing the columns "protein_id", "peptide_id", "transition_id", "peptide_sequence", "precursor_charge", "transition_intensity" and "concentr
report_filename
the path and filename of the PDF report.
prediction_filename
the path and filename of the predictions of the optimal model.
peptide_method
one of "top", "all", "iBAQ", "APEX" or "NSAF" peptide to protein intensity estimation methods.
peptide_topx
a positive integer value of the top x peptides to consider for "top" methods.
peptide_strictness
whether peptide_topx should only consider proteins with the minimal peptide number ("strict") or all ("loose").
peptide_summary
how to summarize the peptide intensities for the "top" methods: "mean", "median", "sum".
transition_topx
a positive integer value of the top x transitions to consider for transition to peptide intensity estimation methods.
transition_strictness
whether transition_topx should only consider peptides with the minimal transition number ("strict") or all ("loose").
transition_summary
how to summarize the transition intensities: "mean", "median", "sum".
cval_method
a method for doing crossvalidation: "boot" (bootstrapping), "mc" (monte carlo cross-validation), "loo" (leaving-one-out).
cval_mcx
a positive integer value of the number of folds for cross-validation.
combine_precursors
whether to pool all precursors of the same peptide.
...
future extensions.

Value

  • The reports specified in the function call.

Details

The ALF modules enables model selection for TopN transitions and peptides for protein quantification (Ludwig et al., 2012). The workflow is completely automated and a report and prediction (using the best model) is generated.

References

Ludwig, C., Claassen, M., Schmidt, A. & Aebersold, R. Estimation of Absolute Protein Quantities of Unlabeled Samples by Selected Reaction Monitoring Mass Spectrometry. Molecular & Cellular Proteomics 11, M111.013987-M111.013987 (2012).

See Also

import, ProteinInference, AbsoluteQuantification, APEX, apexFeatures, proteotypic

Examples

Run this code
data(UPS2MS)

ALF(UPS2_SRM)

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