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

Richard. Axton, et.al., Aminopeptidase O contains a functional nucleolar localization signal and is implicated in vascular biology., Journal of cellular biochemistry, 2008, 103
http://rdf.ncbi.nlm.nih.gov/pubmed/17803194