Dna Library Enrichment
Dna Library Enrichment - Related Videos
11:14
Primer-Free Aptamer Selection Using A Random DNA Library
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Cited by 20 •
2010
SELEX protocols comprise multiple rounds of selection, each of which require regeneration of bound ligands, which in turn require fixed primer sequences flanking the random library regions. These fixed primer sequences can interfere with the selection process (false positives and negatives). Here we present a primer-free protocol.
10:32
A Universal Protocol for Large-scale gRNA Library Production from any DNA Source
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Cited by 2 •
2017
Methods for generating large-scale gRNA libraries should be simple, efficient and cost-effective. We describe a protocol for the production of gRNA libraries based on enzymatic digestion of target DNA. This method, CORALINA (comprehensive gRNA library generation through controlled nuclease activity) presents an alternative to costly custom oligonucleotide synthesis.
08:53
Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
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2025
Enrichment and sequencing of protein-associated nascent DNA (eSPAN) was developed to detect the relative abundance of a chromatin-associated protein on two replicating DNA strands, thereby revealing molecular insight into chromatin replication and its coupled processes. This protocol describes eSPAN procedures in yeast and mouse embryonic stem (ES) cells.
12:33
Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
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Cited by 4 •
2017
The comparison and optimization of two plant organellar DNA enrichment methods are presented: traditional differential centrifugation and fractionation of the total gDNA based on methylation status. We assess the resulting DNA quantity and quality, demonstrate performance in short-read next-generation sequencing, and discuss the potential for use in long-read single-molecule sequencing.
06:57
Enrichment of mRNA and Bisulfite-mRNA Library Preparation for Next-Generation Sequencing
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Cited by 1 •
2023
This protocol provides an easy-to-follow workflow to conduct poly(A) RNA purification, bisulfite conversion, and library preparation using standardized equipment for a biological sample of interest.
FAQs
Complementary probes identify library fragments through sequence matching, allowing the regions of interest to be retained while much of the unrelated DNA is excluded. After hybridization, separation isolates the selected material for sequencing. This mechanism concentrates specific genomic regions or molecular features, which is particularly useful when the desired sequences represent only a small fraction of the library.
Removing or limiting off-target DNA increases the proportion of sequencing capacity devoted to selected regions. As a result, researchers can examine those regions more efficiently and improve their detection within the resulting data. This concentration is valuable for finding variants or identifying pathogen sequences when sequencing an entire genome would devote substantial effort to unrelated DNA.
Hybridization capture uses complementary probes to bind selected library fragments, followed by separation of the retained material. Targeted amplification instead uses sequence-specific primers to increase the representation of chosen sequences. Both approaches focus sequencing on selected targets, but they use different selection mechanisms: one depends on probe-based hybridization and separation, while the other depends on primer-directed amplification.
The approach is most suitable when researchers need focused analysis of particular genes, regulatory regions, genomic regions, or other molecular features. It is also useful when target sequences are rare in the original library, because selective enrichment increases their representation before sequencing. Conversely, it is less necessary when comprehensive sequencing of the entire genome is already the primary objective.
A typical workflow begins with a prepared DNA library and selection of the desired targets. Researchers then apply either complementary probes for hybridization capture or sequence-specific primers for targeted amplification. The selected fragments undergo separation or amplification, respectively, and the enriched library proceeds to sequencing. The resulting data emphasize the chosen genomic regions or molecular features.
The central selection materials are complementary probes for hybridization capture and sequence-specific primers for targeted amplification. Their target sequences determine which fragments receive greater representation in the library. After selection, separation is associated with capture-based enrichment, whereas amplification increases the amount of primer-directed material. These choices establish how the library is focused before sequencing.
Researchers can apply the technique to variant detection, pathogen identification, and focused examination of genes or regulatory regions. It is especially helpful when targets are rare or when whole-genome sequencing is unnecessary. By directing sequencing toward selected material, enrichment supports efficient analysis of biologically relevant regions without requiring comprehensive examination of all genomic DNA.