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Interbands of Drosophila melanogaster polytene chromosomes contain matrix association regions

✍ Scribed by Yu.B. Schwartz; E.S. Ioudinkova; S.A. Demakov; S.V. Razin; I.F. Zhimulev

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 68 KB
Volume: 72
Category: Article
ISSN: 0730-2312
DOI: 10.1002/(sici)1097-4644(19990301)72:3<368::aid-jcb6>3.0.co;2-c

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✦ Synopsis

The DNA of three previously cloned interband regions (85D9/D10, 86B4/B6, and 61C7/C8) of Drosophila melanogaster polytene chromosomes has been tested for the presence of matrix association regions (MAR), using the in vitro matrix-binding assay of Cockerill and Garrard. MARs were found in all three interband regions under study. These results are discussed in frames of a model postulating that interband regions of polytene chromosomes correspond to the chromosomal DNA loop borders, which can be identified in interphase nuclei using biochemical approaches.

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