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Organization of DNA in Dipteran Polytene Chromosomes as Indicated by Polarized Fluorescence Microscopy

James W. MacInnes and Robert B. Uretz
Science
New Series, Vol. 151, No. 3711 (Feb. 11, 1966), pp. 689-691
Stable URL: http://www.jstor.org/stable/1717549
Page Count: 3
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Organization of DNA in Dipteran Polytene Chromosomes as Indicated by Polarized Fluorescence Microscopy
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Abstract

Analysis of the polarization of fluorescence from Drosophila virilis polytene chromosomes stained with acridine orange suggests that the DNA in the interband regions of these chromosomes cannot be in a supercoiled configuration, but must lie parallel to the chromosome axis.

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