We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Electron capture and loss by protonated peptides and proteins in collisions with ... and Na.
- Authors
Hvelplund, P.; Liu, B.; Nielsen, S.B.; Tomita, S.; Cederquist, H.; Jensen, J.; Schmidt, H.T.; Zettergren, H.
- Abstract
Electron capture and loss cross-sections have been measured for collisions between fast multiply charged peptide and protein ions [M+nH]n+ and Na or C60. The ions were produced in an electrospray ion source (ESI) and accelerated to an energy of n × 50 keV. We find that the size of the cross-sections depend strongly on molecule size, ionization energy and projectile charge state n. For multiply charged ubiquitin projectiles, the cross-sections for electron capture are found to be several times larger with a Na target than with a C60 target. This observation is qualitatively explained by means of an over-the-barrier model for electron transfer using metal-sphere descriptions for the electronic responses of the collision partners.
- Subjects
ELECTRONS; PEPTIDES; PROTEINS; SODIUM; UBIQUITIN; ION sources
- Publication
European Physical Journal D (EPJ D), 2003, Vol 22, Issue 1, p75
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/e2002-00220-2