Abstract
We have examined the dissociation of nucleosomes into histones and free, 4.5S DNA over a range of sodium chloride concentrations between 0.25 and 1 M. We have also studied this dissociation as a function of nucleosome concentration at two salt concentrations, 0.8 M and 0.9 M. In addition, we have measured the kinetics of transfer of histone cores from nucleosomes onto recipient bacteriophage T7 DNA in 0.6, 0.7 and 0.8 M NaCl solutions. Although the mechanism of nucleosome transfer is unknown the data presented here are consistent with either a reversible dissociation of the nucleosome or DNA strand displacement by another DNA.
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