Chromatin Nu Bodies: Isolation, Subfractionation and Physical Characterization

Overview

Journal Nucleic Acids Res

Publisher Oxford University Press

Specialty Biochemistry

Date 1976 Dec 1

PMID 1005117

Citations 49

Authors

A L Olins

R D Carlson

E B WRIGHT

D E Olins

Affiliations

Soon will be listed here.

Abstract

Monomer chromatin subunit particles (nu1) have been isolated in gram quantities by large-scale zonal centrifugation of micrococcal nuclease digests of chicken erythrocyte nuclei. nu1 can be stored, apparently indefinitely, frozen in 0.2 mM EDTA (pH 7.0) at less than or equal to 25 degrees C. Aliquots of the stored monomers have been subfractionated by dialysis against 0.1 M KCl buffers into a soluble fraction containing equimolar amounts of H4, H3, H2A, H2B associated with a DNA fragment of approximately 130-140 nucleotide pairs, and a precipitated fraction containing all of the histones including H5 and H1 associated with DNA fragments. The total nu1 and the KCl-soluble fraction of nu1 have been examined by sedimentation, diffusion, sedimentation equilibrium ultracentrifugation, low-angle X-ray diffraction, and electron microscopy. Physical parameters from all of these techniques are presented and correlated in this study.

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