Comparative analysis of denaturing gradient gel electrophoresis and temporal temperature gradient gel electrophoresis in separating Escherichia coli uidA amplicons differing in single base substitutions.

Abstract:

:A set of Escherichia coli freshwater isolates was chosen to compare the effectiveness of denaturing gradient gel electrophoresis (DGGE) vs temporal temperature gradient gel electrophoresis (TTGE) for separating homologous amplicons from the respective uidA region differing in one to seven single base substitutions. Both methods revealed congruent results but DGGE showed a five to eight times higher spatial separation of the uidA amplicons as compared with TTGE, although the experiments were performed at comparable denaturing gradients. In contrast to TTGE, DGGE displayed clear and focused bands. The results strongly indicated a significantly higher discrimination efficiency of the spatial chemical denaturing gradient as compared with the temporal temperature denaturing gradient for separating the uidA amplicons. Denaturing gradient gel electrophoresis proved to be highly efficient in the differentiation of E. coli uidA sequence types.

journal_name

Lett Appl Microbiol

authors

Farnleitner AH,Kreuzinger N,Kavka GG,Grillenberger S,Rath J,Mach RL

doi

10.1046/j.1472-765x.2000.00742.x

subject

Has Abstract

pub_date

2000-06-01 00:00:00

pages

427-31

issue

6

eissn

0266-8254

issn

1472-765X

pii

lam742

journal_volume

30

pub_type

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