Accurate peptide fragment mass analysis: multiplexed peptide identification and quantification.

ABSTRACT: Fourier transform-all reaction monitoring (FT-ARM) is a novel approach for the identification and quantification of peptides that relies upon the selectivity of high mass accuracy data and the specificity of peptide fragmentation patterns. An FT-ARM experiment involves continuous, data-independent, high mass accuracy MS/MS acquisition spanning a defined m/z range. Custom software was developed to search peptides against the multiplexed fragmentation spectra by comparing theoretical or empirical fragment ions against every fragmentation spectrum across the entire acquisition. A dot product score is calculated against each spectrum to generate a score chromatogram used for both identification and quantification. Chromatographic elution profile characteristics are not used to cluster precurso

SUBMITTER: Weisbrod CR 

PROVIDER: S-EPMC3319072 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature