Enrichment Pcr
Enrichment Pcr - Related Videos
02:25
PCR-Based Detection of Foodborne Pathogens from Enriched Fly Samples
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2026
Source: Pava-Ripoll, et al. Detection of Foodborne Bacterial Pathogens from Individual Filth Flies. J. Vis. Exp. (2015)This video demonstrates a PCR-based method that amplifies target bacterial DNA from enriched fly samples using pathogen-specific tablets, enabling real-time fluorescence detection and melting curve analysis to confirm the presence of foodborne pathogens in individual insects.
01:34
Environmental Enrichment for Rodents
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Environmental enrichment involves objects and practices that encourage natural behaviors, improve psychological well-being, and promote better welfare in laboratory rodents. Environmental enrichment should be tailored to the...
08:51
Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR (RS-PCR)
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Cited by 9 •
2016
Here, ribosomal spacer PCR (RS-PCR) is used together with a miniaturized electrophoresis system as a fast and high resolution method for genotyping S. aureus at moderate costs allowing a high throughput.
01:27
Environmental Enrichment in Rabbits and Pigs
0 Views •
2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Importance of Environmental Enrichment Environmental enrichment is a fundamental component of laboratory animal care and welfare. It provides animals with opportunities to express species-specific behaviors, reduces stress, and...
03:41
Agarose Gel Electrophoresis of DNA Amplicons Post PCR: A Method to Analyze Products of Multiplex PCR and Evaluate PCR Reaction Success
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2025
In this video, we demonstrate the separation of bacterial PCR-amplified DNA using agarose gel electrophoresis. Agarose gel functions as a molecular sieve, enabling the negatively-charged DNA to migrate based upon their size under an applied electric field.
FAQs
Selectivity begins with the primers because they provide sequence-dependent recognition that favors copying of the intended DNA region. During each cycle, primer annealing determines whether those sequences can be extended by the thermostable DNA polymerase. Targets that match the primers therefore gain representation across cycles, whereas unrelated DNA is amplified less efficiently or excluded. This reduces sample complexity for later analysis.
The thermostable DNA polymerase extends annealed primers to produce new DNA copies after the sample has been denatured. Its ability to function through repeated heating and cooling cycles allows the same target region to be copied again and again. This repeated extension is essential for accumulating enough enriched material to support detection, sequencing preparation, or analysis of genetic regions.
Repeated cycles give correctly primed target fragments the opportunity to accumulate exponentially, increasing their representation relative to much of the starting DNA. Non-target sequences do not receive the same amplification advantage when they lack effective primer matching. The resulting shift in representation makes rare or initially obscured biological targets more accessible within a complex genomic sample.
A basic workflow begins with a complex DNA sample and sequence-specific primers directed toward the region of interest. The reaction proceeds through repeated denaturation, primer annealing, and extension by a thermostable DNA polymerase. After cycling, the enriched target material can be used for downstream detection, sequencing preparation, or examination of selected genes and genomic regions.
Researchers can use Enrichment PCR before sequencing when a sample contains more genomic material than can be examined efficiently as a whole. Selective amplification increases the representation of chosen genes or genomic regions, helping focus subsequent sequencing on relevant DNA. This approach can reduce sample complexity and make targeted sequence information easier to obtain and analyze.
By concentrating selected DNA regions, Enrichment PCR can improve access to sequence information used to identify genetic variants. It also supports detection of rare biological targets that might be difficult to examine directly in an unprocessed complex sample. The enriched material provides a more focused input for downstream analysis, although the method's main contribution is increased representation of selected sequences.