David Johnston

Mass Spectrometry Identification of Amino Acid Transformations during Oxidation of Peptides and Proteins: Modifications of Methionine and Tyrosine

Swapan Kumar Chowdhury, Jamshid Eshraghi, Henry R. Wolfe et al. · Analytical Chemistry · 1995 · 71 citations

Molecular Biology, Protein Purification, Bioanalysis +17

Characterization of Poly(ethylene glycol)-Modified Superoxide Dismutase:  Comparison of Capillary Electrophoresis and Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry

John Bullock, Swapan K. Chowdhury, David Johnston · Analytical Chemistry · 1996 · 38 citations

Ethylene Glycol, Engineering, Glycobiology +18

Comparison of Results of Various Methods Used to Determine the Extent of Modification of Methoxy Polyethylene Glycol 5000-Modified Bovine Cupri-Zinc Superoxide Dismutase

John Bullock, Swapan K. Chowdhury, A. G. Severdia et al. · Analytical Biochemistry · 1997 · 36 citations

Engineering, Bioanalysis, Biotechnology +3

The post-Carboniferous evolution of Ireland: evidence from Thermal History Reconstruction

Paul F. Green, Ian R. Duddy, Kerry A. Hegarty et al. · Proceedings of the Geologists Association · 2000 · 28 citations

Paleoenvironmental Reconstruction, Engineering, Paleoenvironmental Change +6

Fingerprinting proteins coupled with polymers by mass spectrometry: Investigation of polyethylene glycol-conjugated superoxide dismutase

Swapan K. Chowdhury, Muriel S. Doleman, David Johnston · Journal of the American Society for Mass Spectrometry · 1995 · 23 citations

Engineering, Glycobiology, Peptide Mapping Method +17