| Literature DB >> 6815206 |
R J Hill, M R Mott, E J Burnett, S M Abmayr, K Lowenhaupt, S C Elgin.
Abstract
The regularly repeating periodic nucleosome organization is clearly resolved in the chromatin of the isolated salivary chromosomes of Drosophila melanogaster. A new microsurgical procedure of isolation in buffer A of Hewish and Burgoyne (1973, Biochem. Biophys. Res. Commun., 52:504-510) yielded native Drosophila salivary chromosomes. These chromosomes were then swollen and spread by a modified Miller procedure, stained or shadowed, and examined in the electron microscope. Individual nucleoprotein fibers were resolved with regularly repeated nucleosomes of approximately 10 nm diameter. Micrococcal nuclease digestion of isolated salivary nuclei gave a family of DNA fragments characteristic of nucleosomes for total chromatin, 5S gene, and simple satellite (rho = 1.688 g/cm3) sequences.Entities:
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Year: 1982 PMID: 6815206 PMCID: PMC2112364 DOI: 10.1083/jcb.95.1.262
Source DB: PubMed Journal: J Cell Biol ISSN: 0021-9525 Impact factor: 10.539