relative to [ 3h ] estradiol , significantly more [ 3h ] 4oh-tamoxifen was observed to associate with uterine cells and to penetrate the nucleus so that neither restricted entry nor extranuclear partitioning could explain the failure of [ 3h ] 4oh-tamoxifen-receptor complexes to enter the mg2+-soluble chromatin .
C0007610
nucleus
C0008546
chromatin