Dna Hybridization
Dna Hybridization - Related Videos
16:42
Generation of RNA/DNA Hybrids in Genomic DNA by Transformation using RNA-containing Oligonucleotides
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Cited by 4 •
2010
This work shows how to form an RNA/DNA hybrid at the chromosomal level and reveal transfer of genetic information from RNA to genomic DNA in yeast cells.
06:00
HCR-DNA FISH: A Fluorescence In Situ Hybridization Technique to Detect Viral DNA in Infected Cells
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2023
In this video, the cells infected with MCPyV virions were subjected to in situ hybridization chain reaction to detect MCPyV specific genomes. Further, the DNA-HCR technique was combined with FISH to visualize the MCPyV DNA in infected human skin cells.
11:36
Simple Method for Fluorescence DNA In Situ Hybridization to Squashed Chromosomes
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Cited by 73 •
2015
Here, we present a simple method for performing fluorescence DNA in situ hybridization (DNA ISH) to visualize repetitive heterochromatic sequences on slide-mounted chromosomes. The method requires minimal reagents and it is versatile for use with short or long probes, different tissues, and detection with fluorescence or non-fluorescence-based signals.
09:27
DNA Microarrays: Sample Quality Control, Array Hybridization and Scanning
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Cited by 10 •
2011
We demonstrate the use of DNA microarrays for expression profiling of the nervous system. We describe RNA quality control, sample labeling, and array hybridization and scanning.
04:12
Modified Yeast-One Hybrid Assay to Detect Heteromeric Protein Complex-DNA Interactions
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2025
In this video, we demonstrate the modified yeast one-hybrid assay, which detects multiple proteins interacting with target DNA. The transformed yeast cells contain the target DNA sequence upstream of the reporter gene. Additionally, they express transcription factor proteins. When the proteins form complexes and bind to the target DNA, the reporter gene is expressed and can be detected enzymatically.
FAQs
These variables regulate how readily complementary strands remain paired and therefore affect detection. Temperature and salt concentration influence the conditions under which pairing occurs, while probe length contributes to the balance between strength and specificity. Optimizing these factors helps researchers distinguish intended sequence matches from less suitable pairings in hybridization assays.
Complementary sequences provide the matching bases required for stable pairing through hydrogen bonds between adenine and thymine and between cytosine and guanine. A closer sequence match supports stronger, more specific association, whereas limited complementarity reduces the suitability of the pairing. This relationship allows hybridization to identify particular genetic sequences within a sample.
Strands from different samples can be allowed to pair so researchers can compare their sequence complementarity. The resulting hybridization indicates whether the samples share matching genetic information, supporting comparisons among organisms or DNA sources. In biology, this approach can contribute to studies of evolutionary relationships by linking pairing behavior with genetic similarity.
Researchers first use heating or chemical treatment to separate double-stranded DNA into individual strands. They then cool the material so strands with complementary sequences can anneal, or pair. Adjusting the temperature, salt concentration, and probe length during this sequence affects the strength and specificity of the resulting signal, which is important for reliable detection.
These methods apply complementary sequence pairing in different experimental formats. Southern blotting, fluorescence in situ hybridization, and microarrays use hybridization to locate or identify genetic information, while nucleic acid assays use it for sequence detection. The shared principle allows researchers to examine genes, mutations, pathogens, or related DNA across varied biological samples.
DNA hybridization can indicate whether a target genetic sequence is present and whether sequences from separate samples share complementarity. Consequently, researchers can investigate genes, identify mutations, detect pathogens, and compare genetic information among organisms. Its ability to connect sequence pairing with measurable detection also makes it useful for examining evolutionary relationships in biology.