Mutants Used in the Experiment
Below are two mutant strains developed in Dr. Bassler’s lab. Strain A lacks receptors and therefore can send but not receive the signal. Strain B can’t produce the signal, but can receive it.
![Strain A: Light genes and Signal genes are highlighted, Receptor is dimmed. Signaling molecules move from Signal genes through the cell surface.](images/quorum-sensing-03-1.jpg)
![Strain B: Light genes and Receptor are highlighted, Signal genes are dimmed.](images/quorum-sensing-03-2.jpg)
Below are two mutant strains developed in Dr. Bassler’s lab. Strain A lacks receptors and therefore can send but not receive the signal. Strain B can’t produce the signal, but can receive it.