0 10 Regulation regulation NN 11 13 of of IN 14 17 the the DT 18 29 beta-globin beta-globin NN 30 35 locus locus NN 35 36 . . . 38 51 Transcription transcription NN 52 54 of of IN 55 58 the the DT 59 64 human human JJ 65 76 beta-globin beta-globin NN 77 81 gene gene NN 82 89 cluster cluster NN 90 97 depends depend VBZ 98 102 upon upon IN 103 111 upstream upstream JJ 112 122 regulatory regulatory JJ 123 132 sequences sequence NNS 132 133 , , , 134 139 which which WDT 140 143 are be VBP 144 156 collectively collectively RB 157 163 termed term VBN 164 167 the the DT 168 173 locus locus NN 174 181 control control NN 182 188 region region NN 188 189 . . . 190 196 Recent recent JJ 197 204 studies study NNS 205 209 have have VBP 210 218 provided provide VBN 219 222 new new JJ 223 231 insights insight NNS 232 236 into into IN 237 240 how how WRB 241 244 the the DT 245 255 individual individual JJ 256 261 genes gene NNS 262 264 of of IN 265 268 the the DT 269 276 cluster cluster NN 277 280 are be VBP 281 290 regulated regulate VBN 291 298 through through IN 299 310 development development NN 310 311 . . . 312 315 The the DT 316 320 crux crux NN 321 323 of of IN 324 339 transcriptional transcriptional JJ 340 350 activation activation NN 351 353 is be VBZ 354 357 how how WRB 358 361 the the DT 362 367 locus locus NN 368 375 control control NN 376 382 region region NN 383 395 communicates communicate VBZ 396 400 with with IN 401 404 the the DT 405 418 gene-proximal gene-proximal JJ 419 429 regulatory regulatory JJ 430 438 elements element NNS 438 439 . . .