Double stranded DNA sequencing by tandem mass spectrometry

Fred W. McLafferty*, David J. Aaserud, Ziqiang Guan, Daniel P. Little, Neil L. Kelleher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Electrospray ionization produces far more abundant molecular ions for double stranded (ds) DNA than for single stranded (ss) and accurate molecular masses can provide the base composition of dsDNA. This study shows that the Fourier-transform mass spectra of a ds 64-mer DNA can provide approximately 50% more sequence information than the spectra of either individual ss component. Cleavages triggered by T loss are of low probability, but the opposite is true in the complementary ss strand that bears the base A at this site. The spectrum of the product of the attempted biological synthesis of a ds 70-mer DNA provided critical information on its extensive 3′-end heterogeneity. Published by Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)457-466
Number of pages10
JournalInternational Journal of Mass Spectrometry and Ion Processes
StatePublished - 1997


  • DNA
  • Electrospray
  • Fourier-transform MS
  • Sequencing
  • Tandem

ASJC Scopus subject areas

  • Spectroscopy


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