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

S. Kalantry, et.al., The amnionless gene, essential for mouse gastrulation, encodes a visceral-endoderm-specific protein with an extracellular cysteine-rich domain., Nature genetics, 2001, 27
http://rdf.ncbi.nlm.nih.gov/pubmed/11279523