Nomenclature of the fragments produced from linear peptides as described by Roepstorff and Fohlman (Ref. 1).
The possibilities for the production of different and ions arising from branched and unbranched amino-acid side chains.
Schematic drawing of the tandem TOF mass spectrometer MULTUM-TOF/TOF.
(Color online) Photograph of the tandem TOF mass spectrometer MULTUM-TOF/TOF. MALDI ion source is shown on the left, MULTUM mass spectrometer (MS1) on the center, and the quadratic-field ion mirror (MS2) on the right.
Schematic drawing of the MALDI ion source of the MULTUM-TOF/TOF.
(Color online) Ion trajectories of the MULTUM II geometry multiturn TOF mass spectrometer simulated by the computational program TRIO-DRAW (Ref. 30): (a) top view, (b) direction, and (c) direction.
(Color online) Photograph of the multiturn TOF mass analyzer (MS1). The circle in the center defines the field-free region between the electric sectors.
(Color online) (a) Photograph and (b) isometric drawing of the quadratic-field ion mirror (MS2). The ion mirror consists of 33 elements placed at unequal distances in order to define the field with the smaller number of different applied voltages.
Block diagram of the timing control system.
MALDI-TOF spectra of angiotensin I. (a) Whole isotope distribution of angiotensin I after . (b) Monoisotopic ion has been isolated and transmitted.
High-energy CID spectrum of angiotensin I (DRVYIHPFHL) (a) from all isotopes of angiotensin I (after linear 0 cycle) and (b) from monoisotopic peak (after ). Ions characteristic of high-energy collisions are observed on both spectra.
High-energy CID spectrum of substance P (RPKPQQFFGLM-) from monoisotopic peak after circulating in the MULTUM (about ).
High-energy CID spectrum of bradykinin (RPPGFSPFR) from monoisotopic peak after circulating in the MULTUM (about ).
Reaction pathway for the production of , , and fragments.
Fragmentation cascade at high-energy collisions produces series from or the less abundant series.
The calculated distances of electrodes and applied voltages.
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