@article {9217,
	title = {Evolution of alternative transcriptional circuits with identical logic},
	journal = {Nature},
	year = {2006},
	pages = {415-420},
	doi = {10.1038/nature05099},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/17006507},
	author = {Annie E. Tsong and Brian B. Tuch and Hao Li and Alexander D. Johnson}
}
