title: Isolation of DNA from single microsurgically excised bands of polytene chromosomes of Chironomus.
abstract: A method is described for excising by a glass knife single bands of isolated polytene chromosomes of the salivary glands of Chironomus tentans larvae. DNA strands were isolated from cut-out bands and their contour lengths were determined on electron micrographs. The mean contour length of DNA strands isolated from the double band I-8A was about twice that of the single band I-11B, namely 63 versus 34 micrometers. The described method may be applicable for molecular studies on single bands (e.g., by DNA cloning).
mesh_terms: D000818:Animals; D002683:Chironomidae / Q000235:genetics*; D002875:Chromosomes / Q000032:analysis* / Q000648:ultrastructure; D004247:DNA / Q000302:isolation & purification*; D004175:Diptera / Q000235:genetics*; D008846:Micromanipulation / Q000379:methods*; D008854:Microscopy, Electron; D012469:Salivary Glands / Q000648:ultrastructure
chemical_list: D004247:DNA