What does the future hold for Top Down mass spectrometry?

Journal of the American Society for Mass Spectrometry
Benjamin A Garcia

Abstract

Mass spectrometry (MS) research has revolutionized modern biological and biomedical fields. At the heart of the majority of mass spectrometry experiments is the use of Bottom Up mass spectrometry methods where proteins are first proteolyzed into smaller fragments before MS interrogation. The advent of electron capture dissociation and, more recently, electron-transfer dissociation, however, has allowed Top Down (analysis of intact proteins) or middle down (analysis of large polypeptides) mass spectrometry to both experience large increases in development, growth, and overall usage. Nevertheless, for high-throughput large-scale proteomic studies, Bottom Up mass spectrometry has easily dominated the field. As Top Down mass spectrometry methodology and technology continue to develop, will it genuinely be able to compete with Bottom Up mass spectrometry for whole proteome analysis? Discussed here are the current approaches, applications, issues, and future view of high-throughput Top Down mass spectrometry.

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