Gel Slice Sampling
Gel Slice Sampling - Related Videos
06:30
Gel Purification
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2023
Gel purification is used to recover DNA fragments after electrophoretic separation. DNA recovery from an agarose gel includes three basic steps: binding, washing and eluting from a silica column. DNA is believed to bind to silica in the presence of high salt via a salt bridge. Following binding, DNA is washed of impurities and eluted under low salt conditions disrupting this interaction. This video goes through a step-by-step, generalized procedure for cutting out a band from the gel, gel...
09:22
DNA Gel Electrophoresis
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2023
DNA gel electrophoresis is a technique used for the detection and separation of DNA molecules. An electric field is applied to a gel matrix comprised of agarose, and within the gel, charge particles will migrate and separate based on size. The negatively charged phosphates of the DNA backbone cause DNA fragments to move toward the anode - a positively charged electrode. The video explains the mechanism by which DNA fragments are resolved on an agarose gel, and it provides a step-by-step...
07:31
Two-Dimensional Gel Electrophoresis
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2023
Two-dimensional gel electrophoresis (2DGE) is a technique that can resolve thousands of biomolecules from a mixture. This technique involves two distinct separation methods that have been coupled together: isoelectric focusing (IEF) and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). This physically separates compounds across two axes of a gel by their isoelectric points (an electrochemical property) and their molecular weights. The procedure in this video covers the main...
13:26
Automated Gel Size Selection to Improve the Quality of Next-generation Sequencing Libraries Prepared from Environmental Water Samples
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Cited by 9 •
2015
This manuscript describes an automated gel size selection approach for purifying DNA fragments for next-generation sequencing. The Ranger Technology provides complete automation of the entire process of agarose gel loading, electrophoretic analysis, and recovery of targeted DNA fragments allowing for high-throughput and high quality next-generation sequencing libraries.
10:55
Staining Proteins in Gels
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Cited by 7 •
2008
Following separation by electrophoretic methods, proteins in a gel can be detected by several staining methods. Staining of proteins with Coomassie Blue, Silver Staining, SYPRO Orange, SYPRO Ruby are demonstrated in this video.
FAQs
The key analytical step is associating each recovered fraction with its original position in the gel. Measuring protein, nucleic acid, or other biomolecule content across adjacent slices produces a spatial distribution rather than a single bulk measurement. Researchers can relate separated signals to migration distance, helping assess molecular-size behavior, separation quality, or the location of biochemical activity.
Recovery depends on how the target leaves the gel matrix. Diffusion allows material to move into a buffer, whereas solubilization or elution provides alternative ways to release material from the matrix. The choice can affect how much target becomes available for measurement, so the extraction strategy must match both the gel and the biomolecule being analyzed.
Serial sections are useful when researchers need to map material across a migration region instead of examining only one visible location. Comparing neighboring slices can show whether a target is concentrated in one portion, distributed across several portions, or associated with more than one separated signal. This positional detail supports evaluation of separation quality and complex composition.
A typical workflow selects defined gel portions, separates individual slices or serial sections, and places each portion in a suitable buffer for recovery. Depending on the gel matrix and target, extraction proceeds through diffusion, solubilization, or elution. The recovered material is then measured with a biochemical assay or another analytical technique, with results linked to slice position.
Recovered fractions can be examined for proteins, nucleic acids, or other biomolecules using biochemical assays and analytical techniques. The resulting measurements indicate where material occurs within the gel and can support comparisons among separated components. In appropriate experiments, the recovered material can also be assessed for enzyme activity, extending analysis beyond migration alone.
In biochemistry, the method supports protein characterization, method validation, and downstream analysis after electrophoretic separation. Researchers can use positional recovery to investigate complex composition or determine whether a separation places activity or biomolecular material in the expected region. These applications connect gel migration with measurable biochemical properties rather than treating the gel pattern as the only result.