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Nucleic Acids Research, 1975, Vol. 2, No. 11 2163-2176
© 1975

Articles

Low-angle neutron scattering from chromatin subunit particles

J.F. Pardon1, D.L. Worcester2, J.C. Wooley1, K. Tatchell3, K.E. Van Holde3 and B.M. Richards1

1Searle Research Labs. Lane End Road, High Wycombe, Bucks., UK

To whom requests for reprints should be addressed.

Received October 13, 1975.

Monomer chromatin particles containing 140 base pairs of DNA and eight histone molecules have been studied by neutron scattering. From measurements in various H2O/D2O mixtures, radii of gyration and the average scattering density of the particle were determined. The radius of gyration under conditions when scattering from the DNA dominates is 50Å, and when scattering from the protein dominates, 30Å. Consequently the core of the particle is largely occupied by the histones while the outer shell consists of DNA together with some of the histone.

2 Material Physics Division, AERE Harwell.

3 Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA


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