Reference:
  Author: Richard S. Johnson and J. Alex Taylor
  Title: Searching sequence databases via de novo peptide sequencing by tandem mass spectrometry
  Journal: Molecular Biotechnology
  Year: 2002
  Volume: 22
  Number: 3
  Pages: 301-315
  DOI: 10.1385/MB:22:3:301
  PMID:     12448884
  URL: http://www.springerlink.com/content/3726h1m004207721/
  eprint: http://www.springerlink.com/content/3726h1m004207721/fulltext.pdf

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