A Technique to Prepare a Monoclonal Bacterial Culture

Begin with a bacterial culture, and perform serial dilution to reduce cell density.

Take a small aliquot of the final dilution and spot it onto an agar plate.

Add sterile glass beads and gently shake the plate to ensure spatial separation of the cells, which is essential for obtaining well-isolated colonies.

Remove the glass beads, then invert the plate and incubate.

Individual cells proliferate and form separate colonies, generating a monoclonal culture in which each colony consists of a genetically uniform bacterial population.

Pick individual colonies and transfer them to separate tubes containing a liquid medium.

Incubate the tubes with agitation. Post-incubation, assess the turbidity of each culture.

Bacterial cells suspended in the medium scatter light, making the cultures appear more turbid with increasing cell density.

Select the tube with the highest turbidity, which indicates the densest monoclonal bacterial population, for downstream applications.

Label the three bottles prepared with 100 milliliters of LB Lennox Broth with number one, number two, and number three.

Pipette 0.1 milliliters of the resulted bacterial culture into bottle one. Cap the bottle and swing it by hand for on