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Acridine binding by Escherichia coli: pH dependency and strain differences
Journal of Bacteriology
|February 1, 1968
Summary
Acridine dye binding in Escherichia coli cells shows temperature-dependent reversible and irreversible mechanisms. Acriflavine demonstrates greater binding affinity than other acridine dyes, correlating with cellular effects.
Area of Science:
- Microbiology
- Molecular Biology
- Biochemistry
Background:
- Acridine dyes are known to interact with cellular components.
- Understanding dye-cell interactions is crucial for various biological applications.
Purpose of the Study:
- To characterize the binding parameters of acridine dyes to Escherichia coli cells.
- To investigate the differential binding affinities of various acridine dyes.
Main Methods:
- Characterization of acridine dye binding to Escherichia coli K-12 and E. coli B.
- Assessment of temperature-dependent reversible and irreversible binding.
- Evaluation of dye binding under conditions altering cellular permeability.
Main Results:
- A temperature-dependent, reversible binding of acriflavine was observed, more pronounced in sensitive mutants.
- Irreversible internal binding occurred upon disruption of cellular permeability barriers.
- Acriflavine showed higher binding efficacy than proflavine, 9-aminoacridine, and quinacrine.
Conclusions:
- Acridine dye binding in E. coli involves distinct reversible and irreversible processes.
- Binding affinity correlates with dye structure and cellular conditions.
- These binding properties are linked to the inhibitory effects of acridine dyes on cells.