title: Scanning electron microscopy of isolated Chironomus polytene chromosomes.
abstract: Individual polytene chromosomes have been isolated from Chironomus stigmaterus for scanning electron microscope observations. The three dimensional ultrastructure of these chromosomes consists of a series of chromatin strands extended in the interbands and more tightly coiled or folded in the banded regions. The nucleolus is observed to be a dense disc or doughnut shaped structure surrounding the chromosome while the Balbiani Rings appear as diffuse regions consisting of both fibrillar and granular elements.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure; D002875:Chromosomes / Q000648:ultrastructure*; D004175:Diptera / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning