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Related Experiment Video

Updated: Jun 19, 2026

Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System

Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System

Published on: August 17, 2017

THE PREPARATION OF RELATIVELY PURE BACTERIOPHAGE.

A P Krueger¹, H T Tamada

¹Department of Bacteriology and Experimental Pathology, Stanford University, California.

The Journal of General Physiology

|October 30, 2009

Summary

This study presents a simple electrophoretic method for purifying bacteriophage. Purified phage suspensions are highly lytic and free of contaminating proteins, enabling clearer therapeutic evaluations.

Area of Science:

Microbiology
Biochemistry
Biophysics

Background:

Bacteriophage therapy requires pure phage suspensions to avoid non-specific reactions.
Existing methods for phage isolation and purification can be complex and may introduce contaminants.

Purpose of the Study:

To develop a simple, scalable method for purifying bacteriophage particles.
To characterize the properties of purified bacteriophage suspensions.
To assess the potential of purified phage for therapeutic applications.

Main Methods:

Electrophoretic migration of bacteriophage particles into agar gel.
Re-suspension of bacteriophage particles in a suitable medium.
Analysis of purified suspensions for protein contamination and lytic activity.

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T4 Bacteriophage and E. coli Interaction in the Murine Intestine: A Prototypical Model for Studying Host-Bacteriophage Dynamics In Vivo

T4 Bacteriophage and E. coli Interaction in the Murine Intestine: A Prototypical Model for Studying Host-Bacteriophage Dynamics In Vivo

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Following Cell-fate in E. coli After Infection by Phage Lambda

Following Cell-fate in E. coli After Infection by Phage Lambda

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T4 Bacteriophage and E. coli Interaction in the Murine Intestine: A Prototypical Model for Studying Host-Bacteriophage Dynamics In Vivo

T4 Bacteriophage and E. coli Interaction in the Murine Intestine: A Prototypical Model for Studying Host-Bacteriophage Dynamics In Vivo

Published on: January 26, 2024

Main Results:

The method is simple, scalable, and yields highly lytic phage suspensions (dilution 10^-16).
Purified suspensions contain minimal nitrogen (0.044 mg N/cc) and no detectable proteins.
Purified bacteriophage exhibits reduced stability against chemical agents and drying compared to non-purified phage.

Conclusions:

Electrophoretic purification offers a reliable method for obtaining protein-free bacteriophage suspensions.
Purified bacteriophage is suitable for investigating therapeutic efficacy, minimizing confounding factors.
Further research is needed to address the reduced stability of purified bacteriophage.