TY - BOOK AU - Vesque,C. AU - Ariza-McNaughton,L. AU - Charnay,P. AU - Krumlauf,R. AU - Kuroiwa,A. AU - Maconochie,M. AU - Nonchev,S. TI - Hoxb-2 transcriptional activation in rhombomeres 3 and 5 requires an evolutionarily conserved cis-acting element in addition to the Krox-20 binding site ER -