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Comparison of collisionally activated dissociation mass spectra for the identification of cyclopeptides and cyclodepsipeptides

✍ Scribed by F. Cavelier; C. Enjalbal; J. Martinez; M. Roque; P. Sanchez; J.-L. Aubagnac

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 81 KB
Volume: 13
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19990530)13:10<880::aid-rcm574>3.0.co;2-1

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✦ Synopsis

Collisionally activated dissociation (CAD) spectra of protonated molecules of cyclopeptides and cyclodepsipeptides obtained with two different mass spectrometry systems were compared. Fragmentations were obtained either from collisions induced in the ion source of an electrospray mass spectrometer fitted with a single quadrupole by increasing the extracting cone voltage or from collisions with an inert gas in a free-field area of a fast-atom bombardment (FAB) mass spectrometer. Similar fragmentation pathways were produced with the two configurations even though actual tandem mass spectrometry experiments with magnetic and electric sectors provided more information than cone-induced dissociations. However, only the latter mode allowed us to perform mass spectrometric analyses coupled to liquid chromatography (LC/ ESI-MS) at low cost on commercially widespread instruments.

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