Sentence examples for mass measurement errors from inspiring English sources
When combined with modulated-ion-energy gated trapping, the dynamic calibration of FTICR mass spectra provided decreased mass measurement errors for peptide identifications in conjunction with high resolution capillary LC separations over a dynamic range of peptide peak intensities for each spectrum of 103, and >105 for peptide abundances in the overall separation.
After calibration, systematic bias is removed and the mass measurement errors are centered at 0 ppm.
There are also prediction models that have been designed to estimate the mass measurement errors.
However, for a few compounds mass measurement errors as high as 16 ppm were observed in individual measurements.
Accurate full scan and product ion spectra were obtained and thoroughly data-mined, identifying eleven 4-methoxy-α-PVP metabolites (Table 2) with mass measurement errors <1.5 ppm.
DtaRefinery (http://omics.pnl.gov/software/) was used to improve mass measurement errors for parent ions of tandem MS/MS data by modeling systematic errors based on putative peptide identifications using the algorithm as described [ 16].
Charge state (Z) and mass measurement error (given in parts per million) are indicated.
Figure 1 shows the mass measurement error present in the original mzML files.
Like existing tools, mzRefinery models mass measurement error based on peptide identifications and finds the optimal calibration function.
Up to five orthogonal measurements are implemented: mass measurement error, isotopic envelope fit score, LC peak shape, monosaccharide family relationships, and monosaccharide insource fragmentation.
All peptide matches were initially filtered based on enzyme specificity, mass measurement error, XCorr and DCorr scores and further manually validated for peptide identification and site localization.
