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Table 3 Peptide identification and propagation results on data set 1 (FDR < 2%)

From: Efficient discovery of abundant post-translational modifications and spectral pairs using peptide mass and retention time differences

 

Variable modifications

# of peptides identified

# of spectra interpreted

  

All

Glycosylated

 

DB search

Deamidation (N)

479

79

3514

 

Oxidation (M)

   
 

Deamidation (N)

484

82

3815

 

Oxidation (M)

   
 

Carbamidomethylation (N-term)

   
 

Carbamidomethylation (K)

   

Peptide propagation*

Carbamidomethylation

-

-

+537

 

Cation:Na

-

-

+134

  1. *Peptide propagation is conducted based on the peptide identification results of the first-round database search (first row in the table body). Peptide propagation cannot identify more peptides, but significantly increases the number of interpreted spectra.