1d Sds-page Digestion
1d Sds-page Digestion - Related Videos
07:29
Separating Protein with SDS-PAGE
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2023
Sodium Dodecyl Sulfate Poly-Acrylamide Gel Electrophoresis, or SDS-PAGE, is a widely-used technique for separating mixtures of proteins based on their size and nothing else. SDS, an anionic detergent, is used to produce an even charge across the length of proteins that have been linearized. By first loading them into a gel made of polyacrylamide and then applying an electric field to the gel, SDS-coated proteins are then separated. The electric field acts as the driving force, drawing the SDS...
03:22
SDS-PAGE Based Extraction of Extracellular Vesicles Associated Proteins: A Procedure to Extract Proteins from EVs and Prepare Them for In-Gel Digestion
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2023
In this video, we demonstrate the SDS-PAGE in-gel digestion method for protein extraction from extracellular vesicles or EVs. Once isolated, the obtained protein fragments can be used for proteomic analysis.
01:27
SDS-PAGE
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2023
Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field. A variation of gel electrophoresis, termed polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...
09:48
Performing 1D Thin Layer Chromatography
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2023
Source: Laboratory of Dr. Yuri Bolshan — University of Ontario Institute of Technology Thin layer chromatography (TLC) is a chromatographic method used to separate mixtures of non-volatile compounds. A TLC plate consists of a thin layer of adsorbent material (the stationary phase) fixed to an appropriate solid support such as plastic, aluminum, or glass1. The sample(s) and reference compound(s) are dissolved in an appropriate solvent and applied near the bottom edge of the TLC plate in small...
04:50
Isolation and Digestion of Neutrophil Proteins
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2026
Source:Tia Rizakos1, Jennifer Geddes-McAlister11Molecular and Cellular Biology Department, University of Guelph.This video demonstrates the protein isolation from neutrophils, which is further processed and digested into smaller peptides. These peptides can be used for future analysis.
FAQs
Separating proteins into gel bands reduces the complexity of the original sample before enzymatic digestion and mass spectrometry. Each excised band represents a narrower molecular-mass region, helping connect detected peptides with a specific portion of the electrophoretic protein pattern. This organization supports clearer interpretation when samples contain many proteins, including brain or synaptic proteins.
The excised material undergoes destaining, reduction, alkylation, and trypsin treatment as sequential preparation steps. Together, these operations prepare the protein-containing band for conversion into peptides suitable for mass spectrometric analysis. Keeping these stages distinct helps preserve a traceable workflow from the selected electrophoretic region to the peptide-level measurements.
The workflow provides two linked levels of information: proteins first appear as separated bands, while subsequent trypsin treatment produces peptides that can be identified by mass spectrometry. This connection allows a visible protein pattern to be interpreted through peptide evidence rather than considered only as a band position, supporting identification and quantitative analysis.
After selection, the gel band is excised and destained, then subjected to reduction and alkylation before trypsin treatment. The resulting peptides are prepared for mass spectrometry. This sequence moves the sample from a stained electrophoretic region to an analyzable peptide mixture while retaining the band as the starting point for interpretation.
The workflow can provide peptide-level identification of proteins represented in selected gel bands and support quantitative analysis. It also preserves the relationship between those results and the original electrophoretic protein pattern. Consequently, researchers can examine not only which proteins are present, but also how protein patterns or measured abundance differ among complex samples.
In neuroscience, the method supports characterization of brain proteins, synaptic components, and disease-associated changes. Researchers can use band-resolved samples to examine these protein groups and then connect the observed patterns with peptide identifications and quantitative measurements. This makes the workflow useful for relating molecular changes in neural samples to proteomic evidence.