Combined use of peptide ion and normalized delta scores to evaluate milk authenticity by ion-trap based proteomics coupled with error tolerant searching
Database post-processing validation of MS/MS data sets in ion-trap proteomics. Combined peptide ion and normalized delta scores for confident sequence assignments. Error tolerant searching to maximize sequence coverage. Milk authenticity by identification of species-specific peptides. Direct analysis of tryptic/chymotryptic milk digests, without 2D-PAGE.