Skip to main content
Separation of PEGylated Proteins by Open Tubular Capillary Electrochromatography
Journal of Chromatography A (2004)
  • J. J. Pesek, San Jose State University
  • Maria T. Matyska-Pesek, San Jose State University
  • V. Krishnamoorthi

This study involves the characterization of six polyethylene glycol-modified proteins by open tubular capillary electrochromatography, a high-resolution, versatile and reproducible technique for the analysis of biomolecules and pharmaceuticals. Optimized conditions were obtained with respect to type of capillary modification (cholesterol and octadecyl), applied voltage (+20 and −20 kV), buffer pH (2.14–8.14) and addition of methanol modifier to the mobile phase. Electrochromatograms were obtained with both cathodic and anodic applied electric fields. In the case of one PEG–protein, superoxide dismutase, a comparison was made to a previous study. Reproducibility and column lifetime were also evaluated in assessing the usefulness of the method.

Publication Date
Publisher Statement
SJSU users: use the following link to login and access the article via SJSU databases
Citation Information
J. J. Pesek, Maria T. Matyska-Pesek and V. Krishnamoorthi. "Separation of PEGylated Proteins by Open Tubular Capillary Electrochromatography" Journal of Chromatography A Vol. 1044 Iss. 1-2 (2004)
Available at: