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. 1979 Sep 25;7(2):347-59.
doi: 10.1093/nar/7.2.347.

The distribution of histone H1 subfractions in chromatin subunits

C Gorka, J J Lawrence
Free PMC article

The distribution of histone H1 subfractions in chromatin subunits

C Gorka et al. Nucleic Acids Res. .
Free PMC article

Abstract

Rat liver chromatin was digested with micrococcal nuclease to various extents and fractionated into nucleosomes, di and trimers of nucleosomes on an isokinetic sucrose gradient. In conditions under which degradation of linker DNA within the particles was limited, the electrophoretic analysis of the histone content showed that the overall content of H1 histone increased from nucleosomes to higher order oligomers. Moreover, the histone H1 subfractions were found unevenly distributed among the chromatin subunits, one of them, H1--3 showing most variation. A more regular distribution of these subfractions was found in subunits obtained from a more extended digestion level of chromatin. It is suggested that the H1 subfractions differ in the protection they confer upon DNA.

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