tokens: MDA - MB - 468 cells were stably transfected with either a plasmid having a CMV promoter - driven rabbit beta - globin gene or plasmids having a CMV promoter - driven chimeric gadd45 5 " - UTR - rabbit beta - globin gene , where the entire gadd45 5 " - UTR ( from + 1 to + 298 ) or a 45 bp subfragment of the gadd45 5 " - UTR ( from + 10 to + 55 ) was positioned at the 5 " - end of the rabbit beta - globin gene .