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

Takashi. Angata, et.al., Large-scale sequencing of the CD33-related Siglec gene cluster in five mammalian species reveals rapid evolution by multiple mechanisms., Proceedings of the National Academy of Sciences of the United States of America, 2004, 101
http://rdf.ncbi.nlm.nih.gov/pubmed/15331780