Direct Fluorescence In Situ Hybridization to Polytene Chromosomes
نویسندگان
چکیده
منابع مشابه
Direct fluorescence in situ hybridization to polytene chromosomes.
Fluorescence in situ hybridization (FISH) and its modification, polytene in situ hybridization (PISH) (1,2,4), have widespread application in the analysis of gene localization on interphase, metaphase and polytene chromosomes. However, available protocols use the indirect fluorescence approach, which requires the tedious and timeconsuming immunological detection step in which a fluorochrome-con...
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Fluorescence in situ hybridization (FISH) of specific DNA probes has become a widely used technique mostly for chromosome analysis and for studies of the chromosomal location of specific DNA segments in metaphase preparations as well as in interphase nuclei. FISH on 3D-preserved nuclei (3D-FISH) in combination with 3D-microscopy and image reconstruction is an efficient tool to analyze the spati...
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In situ hybridization is particularly appropriate for mapping specific DNA sequences on polytene chromosomes of Drosophila and other dipterans. This technique is based on the recognition and binding of one labeled sequence (the probe) to homologous sequences on chromosomes fixed on a microscope slide. The probes are labeled with biotin or other nonradioactive products, and the probe signal can ...
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A transmission electron microscope method for gene mapping by in situ hybridization to Drosophila polytene chromosomes has been developed. As electron-opaque labels, we use colloidal gold spheres having a diameter of 25 nm. The spheres are coated with a layer of protein to which Escherichia coli single-stranded DNA is photochemically crosslinked. Poly(dT) tails are added to the 3' OH ends of th...
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DNA in situ hybridization (DNA ISH) is a commonly used method for mapping sequences to specific chromosome regions. This approach is particularly effective at mapping highly repetitive sequences to heterochromatic regions, where computational approaches face prohibitive challenges. Here we describe a streamlined protocol for DNA ISH that circumvents formamide washes that are standard steps in o...
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ژورنال
عنوان ژورنال: BioTechniques
سال: 1998
ISSN: 0736-6205,1940-9818
DOI: 10.2144/98242bm01