Brain Transcriptome Database (BrainTx)http://rdf.ncbi.nlm.nih.gov/pubmed/

Janet M. Young, et.al., V2R gene families degenerated in primates, dog and cow, but expanded in opossum., Trends in genetics : TIG, 2007, 23
http://rdf.ncbi.nlm.nih.gov/pubmed/17382427