Detection and Quantitation Method for Proteomics of Post-Translational Modifications

摘要

The present disclosure relates to the technical field of comparative proteomics, in particular to a detection and quantitation method for proteomics of post-translational modifications. With this method, the protein samples to be studied and internal standards are labeled with isobaric tandem mass tags, and tandem mass spectrometry analysis is carried out for the labeled peptide mixture, wherein the internal standard is a peptide mixture rich in post-translational modifications to be detected. Through this method, the signal of peptides containing the post-translational modifications to be detected can be amplified under the situation that mass spectrometer sensitivity is unchanged, and enrichment of the post-translational modification peptides is not needed. The probability of detecting the peptides containing the post-translational modifications to be detected by mass spectrometer and being selected for subsequent MS/MS analysis is increased.