Genotype and expression analysis of two inbred mouse strains and two derived congenic strains suggest that most gene expression is trans regulated and sensitive to genetic background.
Noyes HA, Agaba M, Anderson S, Archibald AL, Brass A, Gibson J, Hall L, Hulme H, Oh SJ, Kemp S. BMC Genomics. 2010 Jun 7; 11:361. Epub 2010 Jun 7.