Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Quan-Long Pu (Fed)

Displaying 1 - 2 of 2

Consecutive Neutral Losses of H 2 O and C 2 H 4 O From N-Terminal Thr-Thr and Thr-Ser in Collision-Induced Dissociation of Protonated Peptides. Position Dependent Water Loss From Single Thr or Ser.

November 1, 2007

Author(s)

Pedatsur Neta, Quan-Long Pu, Xiaoyu Yang, Stephen E. Stein

A two-step neutral loss from tryptic peptides containing Thr-Thr or Thr-Ser at their N-terminus is studied. This process also requires a mobile proton (i.e., the number of charges on the peptide is greater than the number of basic amino acids) and leads to

Dehydration vs. Deamination of N-Terminal Glutamine in Collision-Induced Dissociation of Protonated Peptide Ions

August 11, 2006

Author(s)

Pedatsur Neta, Quan-Long Pu, Lisa E. Kilpatrick, Xiaoyu Yang, Stephen E. Stein

Some of the most prominent neutral losses in peptide ion fragmentation are the loss of ammonia and water from N-terminal glutamine. These processes are studied by electrospray ionization mass spectrometry in singly- and doubly-protonated peptide ions