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Nucleic Acids Research, 1980, Vol. 8, No. 22 5363-5376
© 1980

MOLECULAR BIOLOGY

Different repeat lengths in rat satellite I DNA containing chromatin and bulk chromatin

Akira Omori, Tibor Igo-Kemenes and Hans G. Zachau

Institut für Physiologische Chemie, Physikalische Biochemie und Zellbiologie der Universität München GFR

Received July 23, 1980. The nucleosome repeat structure of a rat liver chromatin component containing the satellite I DNA (repeat length 370 bp) was investigated. Digestion experiments with micrococcal. nuclease, DNAase II, and the Ca2+/Mg2+-dependent endogenous nuclease of rat liver nuclei revealed a repeat unit of 185 nucleotide pairs which is shorter by approximately 10 bp than the repeat unit of the bulk chromatin of this cell type. The difference seems not to be related to the histone composition which was found to be similar in the two types of chromatin.


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