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Macromolecule Analysis Based on Electrophoretic Mobility in Air: Globular Proteins
Abstract
Globular proteins ranging in molecular mass from 5.7 to 669 kDa were separated and analyzed using an aerosol technique based on the electrophoretic mobility of singly-charged molecular ions in air. The ions were produced by electrospraying and drying 100-nm-diameter droplets of a liquid suspension of the proteins, using ionized air to remove the droplet charge due to the spray process. The electrophoretic mobility was measured using a modified commercial continuous-flow differential mobility analyzer operated near atmospheric pressure. An unmodified commercial condensation particle counter was used for detection. The concentrations analyzed ranged from 0.02 to 200 μg of protein/mL of buffer, with a liquid sample flow rate of approximately 50 nL/min. Sampling time of 3 min was used for each complete distribution measured. The electrophoretic mobilities measured were determined entirely from air flow rates, apparatus geometry, and applied potentials. Results were expressed as electrophoretic mobility equivalent diameters using a Millikan formula.
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Citations
Cited by
Protein Complexes in the Gas Phase: Technology for Structural Genomics and Proteomics
Benesch, J. L. P., Ruotolo, B. T., Simmons, D. A., & Robinson, C. V. (2007) · Chemical Reviews · doi:10.1021/cr068289b · Cited by 408
Physical analysis of virus particles using electrospray differential mobility analysis
Pease, L. F. (2012) · Trends in Biotechnology · doi:10.1016/j.tibtech.2011.11.004 · Cited by 43
Bimai, O., Banerjee, I., Rozman Grinberg, I., Huang, P., Hultgren, L., Ekström, S., Lundin, D., Sjöberg, B.-M., & Logan, D. T. (2024) · eLife · doi:10.7554/elife.89292 · Cited by 3
(2024) · doi:10.7554/elife.89292.4 · Cited by 1
Bimaï, O., Banerjee, I., Grinberg, I. R., Huang, P., Hultgren, L., Ekström, S., Lundin, D., Sjöberg, B.-M., & Logan, D. T. (2023) · doi:10.1101/2023.06.20.545753 · Cited by 1
Metadata
- Authors
- Kaufman, S. L., Skogen, J. W., Dorman, F. D., Zarrin, F., & Lewis, K. C.
- Venue
- Analytical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 1996-06-01
- Volume
- 68
- Issue
- 11
- Pages
- 1895-1904
- ISSN
- 0003-2700 (ISSN-L)
- 1520-6882
- OpenAlex
- W1966985858
- Cited by
- 218
- References
- 0
- FWCI
- 4.60
- Type
- journal article
- Language
- en
- Open access
- closed
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