title: Organization of DNA in dipteran polytene chromosomes as indicated by polarized fluorescence microscopy.
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.
mesh_terms: D000166:Acridines; D000818:Animals; D002875:Chromosomes; D004247:DNA; D004330:Drosophila; D066298:In Vitro Techniques; D008856:Microscopy, Fluorescence; D012469:Salivary Glands; D013194:Staining and Labeling
chemical_list: D000166:Acridines; D004247:DNA