1. http://www.invitrogen.com/site/us/en/home/References/Ambion-TechSupport/nuclease-enzymes/general-articles/the-basics-rnase-control.html
2. http://www.ncbi.nlm.nih.gov/geo/
3. http://media.affymetrix.com/support/technical/datasheets/rat230_2_datasheet.pdf
4. http://www. bioconductor.org/
5. The transcriptome of the medullary area postrema: the thirsty rat, the hungry rat and the hypertensive rat;Hindmarch;Experimental Physiology,2011