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

Beata. Winnicka, et.al., CD13 is dispensable for normal hematopoiesis and myeloid cell functions in the mouse., Journal of leukocyte biology, 2010, 88
http://rdf.ncbi.nlm.nih.gov/pubmed/20430777