Electron capture-induced dissociation of AK dipeptide dications: Influence of ion velocity, crown-ether complexation and collision gas
2008 (English)In: International Journal of Mass Spectrometry, ISSN 1387-3806, Vol. 276, no 2-3, 77-81 p.Article in journal (Refereed) Published
The fragmentation of doubly protonated AK dipeptide ions has been investigated after collisional electron transfer. Electron capture leads to three dominant channels, H loss, NH3 loss, and N–Cα bond breakage to give either c+ or z+ fragment ions. The relative importance of these channels has been explored as a function of ion velocity, the degree of complexation with crown ether, and collision gas. Our results indicate that H loss and NH3 loss are competing channels whereas the probability of N–Cα bond breakage is more or less constant.
Place, publisher, year, edition, pages
2008. Vol. 276, no 2-3, 77-81 p.
Electron capture-induced dissociation, Dipeptide, Collision gas, Electronically excited state
Research subject Physics
IdentifiersURN: urn:nbn:se:su:diva-17047DOI: 10.1016/j.ijms.2008.05.004ISI: 000259846000002OAI: oai:DiVA.org:su-17047DiVA: diva2:183567