Quorum-Sensing Mutants

A quorum-sensing mutant strain may be unable to make the signal, or lack the ability to receive and respond to the signal. Or it may lack output genes, in this case, for bioluminescence.

Light genes and Receptor are highlighted, Signal genes are dimmed.
Mutant strain unable to produce the signal
Light genes and Signal genes are highlighted, Receptor is dimmed. Signaling molecules move from Signal genes through the cell surface.
Mutant strain unable to receive the signal
Receptor and Signal genes are highlighted. Signaling molecules move from Signal genes through the cell surface. One is bound to a Receptor with an arrow pointing to Light genes which is dimmed.
Mutant strain lacks output genes