Mechanisms for the Selective Gas-Phase Fragmentation Reactions of Methionine Side Chain Fixed Charge Sulfonium Ion Containing Peptides

Leaving group effects on the selectivity

Leaving group effects on the selectivity of the gas-phase fragmentation reactions of side chain fixed-charge-containing peptide ions

✍ Kade D. Roberts; Gavin E. Reid 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 890 KB

## Abstract The effect of trialkylsulfonium __versus__ quaternaryalkylammonium ions on the multistage gas‐phase fragmentation reactions of side chain, fixed‐charge, cysteine‐containing peptides has been examined in a quadrupole linear ion trap. These tandem mass spectrometry experiments reveal that