chromatin , prepared from sonicated nuclei of rat prostate , was labeled by isotope exchange with [ 3h ] dihydrotestosterone and found to contain 19,000 +/- 900 ( mean +/- s.e . ) salt-extractable androgen receptors/nucleus which sedimented in the 3-4 s region of 7.6-76 % ( v/v ) glycerol gradients and at a density of approximately 1.28-1.35 g/ml in cscl gradients .
C0008546
chromatin
C0007610
nucleus