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. 1976 Nov;3(11):3213–3226. doi: 10.1093/nar/3.11.3213

Specific cleavage of chromatin by restriction nucleases.

W Hörz, T Igo-Kemenes, W Pfeiffer, H G Zachau
PMCID: PMC343164  PMID: 826886

Abstract

Digestion of mouse and rat liver nuclei with a restriction nuclease from Bacillus subtilis (Bsu) is examined in continuation of previous work from this laboratory (Pfeiffer et al., 1975, Nature 258, 450). The finding of more than 95% C in the 5'-termini of the DNA fragments generated during digestion with Bsu shows that the participation of endogenous nucleases in Bsu digestion is extremely small. The restriction nuclease Hae III, an isoschizomer of Bsu, yields identical degradation patterns. The patterns conform to what one expects from statistical calculations based on a nucleosome structure of chromatin with a region preferentially accessible to the nuclease of 40-50 nucleotide pairs per nucleosome. Integrity of the histones is maintained during digestion with restriction nucleases. Digestion of mouse liver nuclei with EcoRII shows that most if not all of the satellite DNA is organized in a nucleosome structure. Also in rat liver, much of the repetitive DNA appears to be present in nucleosomes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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