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Search Publications by: Stephen E. Stein (Fed)

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Displaying 126 - 150 of 191

Effect of N-Terminal Glutamic Acid and Glutamine on Fragmentation of Peptide Ions

March 27, 2010
Author(s)
Bhaskar Godugu, Pedatsur Neta, Yamil Simon, Stephen Stein
A prominent dissociation path for electrospray generated tryptic peptide ions is the dissociation of the peptide bond linking the second and third residues from the amino-terminus. The formation of the resulting b 2 and y n-2 fragments has been

Classical Trajectories and RRKM Modeling of Collisional Excitation and Dissociation of Benzylammonium and tert Butyl Benzylammonium Ions in a Quadrupole-Hexapole-Quadrupole Tandem Mass Spectrometer

March 1, 2010
Author(s)
Vadim D. Knyazev, Stephen Stein
Collision-induced dissociation of the benzylammonium and the 4-tert butyl benzylammonium ions was studied experimentally in an electrospray ionization quadrupole-hexapole-quadrupole tandem mass spectrometer. Ion fragmentation efficiencies were determined

Collisional Energy Dependence of Peptide Ion Fragmentation

March 1, 2009
Author(s)
Pedatsur Neta, Y Simon-Manso, Xiaoyu Yang, Stephen Stein
The energy dependence of fragmentation in a collision cell was measured for 2100 peptide ions derived from the digestion of twenty four common proteins. Most proteins were digested by trypsin and derived peptides were divided into several classes

The Drosophila melanogaster PeptideAtlas facilitates the use of peptide data for improved fly proteomics and genome annotation

February 11, 2009
Author(s)
Sandra Loevenich, Erich Brunner, Nichole King, Stephen Stein, Ernst Hafen, Rudolf Aebersold
Background: Crucial foundations of any quantitative systems biology experiment are correct genome and proteome annotations in the reference databases used. Protein databases compiled from high quality empirical protein identifications, which are - in turn

Computer Assisted Expert Evaluation of NIST/NIH/EPA Mass Spectral Library

October 16, 2008
Author(s)
Anzor I. Mikaia, Stephen E. Stein, Vladimir G. Zaikin, D Zhu
The methods used to build a high quality, comprehensive reference library of positive ion EI mass spectra will be discussed. A description of the development of the present system of evaluation will be presented with emphasis on establishing the criteria

NIST 1. NIST/EPA/NIH Mass Spectral LibraryNIST '98 ASCII Version

October 16, 2008
Author(s)
Stephen E. Stein
NIST '98 is a fully evaluated collection of electron-ionization mass spectra. It is the product of a ten-year effort by a team of experienced mass spectrometrists in which each spectrum was examined for correctness.This has led to thousands of selections

NIST 35. NIST/EPA Gas-Phase Infrared Database - JCAMP Format

October 16, 2008
Author(s)
Stephen E. Stein
This data collection contains 5,228 infrared spectra in the JCAMP-DX (Joint Committe for Atomic and Molecular Physical Data Data Exchange) format. They are provided in two separate files on six (6) high density 3 diskettes for MS-DOS personal computers

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

Development of Database on Gas-Chromatographic Retention Properties of Organic Compounds

July 2, 2007
Author(s)
Valeri I. Babushok, Peter J. Linstrom, J J. Reed, I G. Zenkevich, Robert L. Brown, William G. Mallard, Stephen E. Stein
A comprehensive database of gas chromatographic properties of chemical compounds has been developed using multiple literature sources. The collection of retention data for non-polar and polar stationary phases currently contains 292,924 data records for 42

Fragmentation of Leucine Enkephalin as a Function of Laser Fluence in a MALDI TOF-TOF

April 2, 2007
Author(s)
Jennifer M. Campbell, Stephen Stein, Paul S. Blank, Jonathan Epstein, Marvin L. Vestal, Alfred L. Yergey
The effects of laser fluence on ion formation in MALDI was studied using a tandem TOF mass spectrometer using a Nd-YAG laser and alpha-cyano hydrocinnamic acid matrix. Leucine enkephalin ionization and fragmentation were followed over laser fluence ranging