Dna Strand Purification
Dna Strand Purification - Related Videos
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.
13:46
Separation of Single-stranded DNA, Double-stranded DNA and RNA from an Environmental Viral Community Using Hydroxyapatite Chromatography
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Cited by 5 •
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We describe an efficient method to separate single-stranded DNA, double-stranded DNA and RNA molecules from environmental viral communities. Nucleic acids are fractionated using hydroxyapatite chromatography with increasing concentrations of phosphate-containing buffers. This method permits the isolation of all viral nucleic acid types from environmental samples.
06:12
Production of Double-stranded DNA Ministrings
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Cited by 9 •
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The linear covalently closed (LCC) DNA minivector (DNA ministring) is a non-viral gene delivery vector offering high transfection efficiency and is relevant to any DNA delivery application. The production system is simple, rapid, and scalable in vivo. The following protocol provides visual step-by-step instructions for the production of DNA ministrings.
10:23
Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles
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Cited by 5 •
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DNA tiling is an effective approach to make programmable nanostructures. We describe the protocols to construct complex two-dimensional shapes by the self-assembly of single-stranded DNA tiles.
03:02
Microsphere Polymerase Chain Reaction to Amplify Single-Stranded DNA
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2025
This video describes the technique of amplifying single-stranded DNA using oligonucleotide-coated polymer microspheres in a single-tube reaction. This process yields pure single-stranded DNA, which can be further used for DNA sequencing and microarray analysis.
FAQs
Chaotropic salts create the chemical conditions that allow DNA to bind to a silica membrane after cell lysis releases the nucleic acids. This binding step separates DNA from much of the original biological mixture and prepares it for sequential washing. In chemistry-based workflows, controlling this stage is essential because inadequate binding can reduce DNA recovery before downstream analysis.
Cell lysis releases DNA from the starting material, making the nucleic acids accessible for capture. After DNA binds to silica, wash steps remove proteins, salts, and other contaminants while the DNA remains associated with the membrane. These stages work together: incomplete release can limit recovery, whereas insufficient washing can leave impurities that interfere with later reactions.
A low-salt buffer releases DNA from the silica membrane after contaminants have been removed. This produces a DNA preparation suitable for analytical and molecular biology workflows rather than leaving the nucleic acid attached to the membrane. The elution stage directly affects whether the recovered material can be measured reliably and used consistently in sequencing, PCR, cloning, or restriction analysis.
Purity and recovery influence both the amount of DNA available and the reliability of reactions performed with it. Residual proteins, salts, or other contaminants can make reaction results harder to interpret, while inconsistent recovery can reduce reproducibility between samples. For chemistry and molecular biology experiments, a clean and consistently recovered DNA preparation supports more dependable quantitative measurements and downstream analyses.
The workflow begins with cell lysis, followed by conditions that promote DNA binding to a silica membrane, commonly through chaotropic salts. The membrane is then washed to remove proteins, salts, and other contaminants. Finally, a low-salt buffer elutes the DNA. Maintaining this sequence helps produce material with the purity and recovery required for subsequent work.
Purified DNA can serve as input for sequencing, PCR, cloning, and restriction analysis. It can also support quantitative measurements when researchers need to determine or compare DNA amounts. Because purification removes components of the original mixture that may affect reactions, the process is particularly useful when experimental outcomes must be compared across samples or interpreted with confidence.