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Appl Environ Microbiol, July 1998, p. 2572-2577, Vol. 64, No. 7
Department of Chemical and Environmental
Engineering, The University of Arizona, Tucson, Arizona 85721
Received 12 December 1997/Accepted 17 April 1998
The electrophoretic mobilities of three bacterial strains were
investigated by capillary electrophoresis (CE) and were compared with
results obtained by microelectrophoresis (ME). The CE measurements yielded bimodal electropherograms for two of the strains, thus illustrating for the first time that surface charge variations within a monoclonal population can be probed by CE. Intrapopulation variations were not detected by ME. The mobilities of three chemically distinct types of latex microspheres were also measured. Differences between the mean mobilities obtained by CE and ME were not
statistically significant (P
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Capillary Electrophoresis Measurements of
Electrophoretic Mobility for Colloidal Particles of Biological
Interest
0.50); the standard
deviations of the CE measurements were typically 2 to 10 times smaller
than those obtained by comparable ME measurements. The reproducibility
of CE permitted batch-to-batch mobility variations to be probed for the
bacteria (one of the strains exhibited such variations), and
aggregation was evident in one of the latex suspensions. These effects
were not measurable with ME.
*
Corresponding author. Mailing address: Department of
Chemical and Environmental Engineering, The University of Arizona,
Tucson, AZ 85721. Phone: (520) 621-6043. Fax: (520) 621-6048. E-mail: jcb{at}maxwell.che.arizona.edu.
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