Photodissociation spectroscopy of trapped protonated tryptophan

J Chem Phys. 2005 Feb 15;122(7):074310. doi: 10.1063/1.1850459.

Abstract

We have coupled a quadrupole ion trap with a frequency doubled optical parametric oscillator laser. The photodissociation spectrum of the protonated tryptophan ion from 215 to 320 nm is reported. The yields of fragmentation on each mass channel as a function of the laser wavelength were obtained. We also report experiments involving multiple stages of laser induced dissociation and discuss possible structures for the fragmentation products.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Gas Chromatography-Mass Spectrometry / instrumentation
  • Gas Chromatography-Mass Spectrometry / methods*
  • Light
  • Protons
  • Spectrometry, Mass, Electrospray Ionization / instrumentation
  • Spectrometry, Mass, Electrospray Ionization / methods*
  • Tryptophan / analysis*
  • Tryptophan / chemistry*
  • Tryptophan / radiation effects

Substances

  • Protons
  • Tryptophan