Length effects in VUV photofragmentation of protonated peptides.
Summary of "Length effects in VUV photofragmentation of protonated peptides."
We have studied photoionization of protonated synthetic peptides YG(n)F (n = 0, 1, 3, 5, 10). Photon energies ranging from 8 to 30 eV were used. For YG(n)F peptides up to n = 5 small fragment ions related to the sidechains of the aromatic terminal amino acids Y and F dominate the fragmentation patterns. The associated yields scale with total photoabsorption cross section, demonstrating efficient hole migration towards the terminal amino acids upon photoionization of the peptide backbone. For n = 10 the side-chain loss channel is quenched and a series of large dications appear.
KVI Atomic and Molecular Physics, University of Groningen, Zernikelaan 25, 9747AA Groningen, The Netherlands. email@example.com.
This article was published in the following journal.
Name: Physical chemistry chemical physics : PCCP
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