Song, Z., McCall, K. and Steller, H. 1997. McCall, K. and Bender, W. 1996. Probes for chromatin accessibility in the Drosophila bithorax complex respond differently to Polycomb-mediated repression. EMBO Journal 15, 569-580 . McCall, K., O'Connor, M. B. and Bender, W. 1994.
Enhancer traps in the bithorax complex mark parasegmental domains.