We are in fact doing a lot of work on interspecies promoter/enhancer
conservation amongst developmentally restricted genes.
A reasonable review can be found in:
BioEssays
1992 vol 14; pp 237-244
Douglas R Cavener
"Transgenic animal studies on the Evolution og Genetic Regulatory Circuitries"
Sam Aparicio
saparici at med.cam.ac.uk
