Noncoding RNA synthesis and loss of Polycomb group repression accompanies the colinear activation of the human HOXA cluster
Luca Sessa, Achim Breiling, Giovanni Lavorgna, Laura Silvestri, Giorgio Casari, and Valerio Orlando
RNA. 2007 February; 13(2): 223–239. doi: 10.1261/rna.266707.PMCID: PMC1781374