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

Mariana. de Napoles, et.al., Polycomb group proteins Ring1A/B link ubiquitylation of histone H2A to heritable gene silencing and X inactivation., Developmental cell, 2004, 7
http://rdf.ncbi.nlm.nih.gov/pubmed/15525528