Pcr Sequencing Assays
Pcr Sequencing Assays - Related Videos
04:09
High-Resolution Melting PCR to Determine Sequence Variations in Mutant DNA Sequences
0 Views •
2025
In this video, we describe a high-resolution melting PCR technique to determine the length polymorphism of DNA fragments of varying sequence lengths, based on melting temperature analysis.
03:20
Nested-PCR to Detect a Specific Viral Genomic Sequence
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2025
This video describes nested polymerase chain reaction, a technique that consists of two sequential PCR amplification processes using two primer sets. The first set of primers is intended to anneal to sequences upstream of the second set, resulting in selective amplification of specific gene sequences. This PCR is more sensitive and specific than a normal PCR and is widely used as a detection technique for various diseases.
10:57
16S rRNA Sequencing: A PCR-based Technique to Identify Bacterial Species
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2023
Source: Ewa Bukowska-Faniband1, Tilde Andersson1, Rolf Lood1 1 Department of Clinical Sciences Lund, Division of Infection Medicine, Biomedical Center, Lund University, 221 00 Lund, Sweden Planet Earth is a habitat for millions of bacterial species, each of which has specific characteristics. Identification of bacterial species is widely used in microbial ecology to determine biodiversity of environmental samples and medical microbiology to diagnose infected patients. Bacteria can be classified...
10:15
Multiplex PCR and Reverse Line Blot Hybridization Assay (mPCR/RLB)
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Cited by 21 •
2011
An inexpensive, high throughput method for simultaneous detection of up to 43 molecular targets is described. Applications of mPCR/RLB include microbial typing and detection of multiple pathogens from clinical samples.
10:41
Wild-type Blocking PCR Combined with Direct Sequencing as a Highly Sensitive Method for Detection of Low-Frequency Somatic Mutations
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Cited by 5 •
2017
Wild-type blocking PCR followed by direct sequencing offers a highly sensitive method of detection for low frequency somatic mutations in a variety of sample types.
FAQs
Primers determine which DNA region is copied, so they establish the boundaries of the analysis before sequencing begins. Because the assay focuses amplification on a selected target, the resulting sequence provides detailed information about that region rather than an unfocused survey of all genetic material. This design supports targeted examination of disease-associated variants or clinically relevant mutations.
Each PCR cycle contributes to target enrichment through a defined sequence of steps. During denaturation, the DNA strands separate; annealing allows primers to bind their selected regions; extension then generates new DNA copies. Repeating these stages produces many copies of the chosen segment, making its nucleotide sequence available for focused analysis.
Their main advantage is concentration on a chosen region. When a research or clinical question concerns one suspected disease-associated variant, infectious organism, or clinically relevant mutation, a targeted assay can provide focused genetic information without requiring a broader sequencing approach. This makes the method useful when comprehensive analysis is unnecessary or impractical.
A practical workflow begins by selecting the DNA region of interest and designing primers that define it. The sample then undergoes repeated denaturation, annealing, and extension cycles to generate amplified product. Sequencing of that product identifies its nucleotide bases, which can then be examined for variants or mutations relevant to the clinical or research question.
In medicine, these assays can support detection of disease-associated variants, identification of infectious organisms, and characterization of clinically relevant mutations. The relevant target is selected before amplification, allowing the analysis to focus on genetic material connected to a particular diagnostic or investigative question rather than treating all DNA regions as equally important.
The identified nucleotide sequence can provide evidence about disease-associated variants or other clinically relevant mutations. In a medical setting, that information may support diagnosis and treatment selection; in research, it can help characterize genetic changes or infectious organisms. The value comes from connecting a focused sequence result with the clinical or scientific question being investigated.