Bacterial evolution by intelligent design.

@article{Winans2006BacterialEB,
  title={Bacterial evolution by intelligent design.},
  author={Stephen C Winans},
  journal={ACS chemical biology},
  year={2006},
  volume={1 7},
  pages={429-31}
}
In a process called quorum sensing, bacteria produce and secrete certain signaling compounds (called autoinducers) that bind to receptors on other bacteria and activate transcription of certain genes. A clever genetic selection yields a new quorum-sensing transcriptional regulator that marches to the beat of a different drummer.