Gel Free Fractionation
Gel Free Fractionation - Related Videos
11:38
CN-GELFrEE - Clear Native Gel-eluted Liquid Fraction Entrapment Electrophoresis
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Cited by 11 •
2016
This protocol describes how to prepare and perform clear native gel-eluted liquid fraction entrapment electrophoresis (CN-GELFrEE), a native separation technique for non-covalent biomolecular assemblies and proteins from heterogeneous samples that is compatible with various downstream protein analysis techniques.
07:57
Using the GELFREE 8100 Fractionation System for Molecular Weight-Based Fractionation with Liquid Phase Recovery
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Cited by 17 •
2009
The accompanying video describes the use of the GELFREE 8100 Fractionation System, which partitions complex protein samples on the basis of molecular weight and recovers the fractions in liquid phase. The video describes how the technology works, how it is used, and provides resultant data, with polyacrylamide gel electrophoresis analysis of fractionated bovine liver homogenate.
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...
10:09
Fractional Distillation
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2023
Source: Laboratory of Dr. Nicholas Leadbeater — University of Connecticut Distillation is perhaps the most common laboratory technique employed by chemists for the purification of organic liquids. Compounds in a mixture with different boiling points separate into individual components when the mixture is carefully distilled. The two main types of distillation are "simple distillation" and "fractional distillation", and both are widely used in organic chemistry laboratories. Simple distillation...
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...
FAQs
The workflow separates molecules by exploiting measurable differences in properties such as size, charge, solubility, hydrophobicity, or affinity. A chosen process enriches or removes components that behave differently under the selected conditions, producing fractions with less varied composition. This selective partitioning is the central mechanism that makes complex biological mixtures more suitable for downstream analysis.
Dividing a complex protein or peptide mixture into simpler fractions reduces interference between components during analysis. In mass spectrometry, this can improve analytical coverage by allowing more molecules to be detected or characterized within each fraction. The resulting separation also supports clearer comparisons of cellular composition and biological responses than analysis of an unfractionated mixture alone.
Gel Free Fractionation keeps separation in solution rather than resolving molecules within a polyacrylamide or agarose gel. It can therefore use precipitation, centrifugation, liquid chromatography, or selective extraction to create fractions. The distinction is important because researchers can choose among several property-based solution processes while avoiding gel-based resolution as the organizing step.
A workflow may use precipitation, centrifugation, liquid chromatography, or selective extraction, depending on which molecular property provides the most useful separation. These processes can divide a biological sample into fractions before identification and quantification. Combining fractionation with downstream analysis helps transform a complex starting mixture into separate portions that are easier to examine.
Researchers first divide a protein or peptide mixture into less complex fractions using an appropriate solution-based process. Each fraction can then proceed to identification or quantification by mass spectrometry. This preparation reduces interference and may improve analytical coverage, making the method useful when the original biological sample contains many components that complicate measurement.
In biology, the approach supports comparative studies of cellular composition, biomarker discovery, and investigations of biological responses. Researchers can compare fractions from different samples, search for components associated with a condition, or examine how molecular composition changes after a response. Its value comes from improving access to information within complex protein or peptide mixtures.