Protein Band Detection
Protein Band Detection - Related Videos
02:35
Band Theory
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2020
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands. The energy difference between these bands is known as the band gap. Conductor, Semiconductor,...
09:00
Detection of Protein Ubiquitination
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Cited by 96 •
2009
Ubiquitination is a key posttranslational modification carried out by a set of three enzymes. Mutations of genes involved in this modification are associated with many different human diseases. Here, we describe protocols to detect protein ubiquitination in cultured cells in vivo and test tubes in vitro.
06:15
Biotinylated Cell-Penetrating Peptide Probe to Detect Protein-Protein Interactions
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2025
This video demonstrates a technique that uses biotinylated cell-penetrating peptides to detect intracellular protein-protein interactions. The cell-penetrating peptides facilitate the conjugated peptide to enter a cell and specifically bind to its interacting proteins. The biotin, after binding to avidin, allows purification of the interacting proteins’ complex from a cell lysate.
08:46
Green Fluorescent Protein-based Expression Screening of Membrane Proteins in Escherichia coli
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Cited by 34 •
2015
A streamlined approach to screening for the expression of recombinant membrane proteins in Escherichia coli based on fusion to green fluorescent protein is presented.
03:41
Fluorescence Anisotropy-Based Detection of Protein-Protein Interactions
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2025
In this video, we describe the fluorescence anisotropy technique to study the interactions between the fluorophore-tagged Shwachman-diamond syndrome (SBDS) protein and the elongation factor-like 1 GTPase (EFL1). On incubating SBDS proteins with gradually increasing concentrations of EFL1, a steady increase in anisotropy is observed, indicating a successful interaction between the two proteins.
FAQs
Band position reflects how proteins migrate through the gel in response to their size and electrical properties. Because these characteristics influence separation, the resulting pattern can show whether components occupy similar or different apparent molecular-size ranges. Examining positions across samples helps researchers evaluate separation quality and recognize changes in the protein composition being studied.
General stains such as Coomassie or silver reveal overall protein patterns across a sample, so they are useful when the aim is to inspect many proteins at once. Antibody-based detection instead selects a target protein in a blot. Choosing between them depends on whether the experiment requires a broad view of sample composition or focused evidence for one protein.
Band intensity can support comparisons of relative protein abundance, but it should be interpreted together with the full pattern. A stronger or weaker signal may indicate a change in the amount of a protein, while additional or missing bands can reveal altered sample complexity. These comparisons are most useful when samples are examined under consistent experimental conditions.
First, proteins are separated electrophoretically in a gel. The separated material is then visualized either with a general stain, such as Coomassie or silver, or through blotting followed by antibody-based detection of a selected target. The resulting bands are compared for presence, relative abundance, apparent molecular size, and overall pattern, depending on the experimental question.
During protein purification, band patterns help reveal sample complexity and indicate how the protein mixture changes across the work. In recombinant protein production, detection can provide evidence that the intended protein is present and allow its apparent molecular size to be compared within the experiment. These observations help assess purification progress and production outcomes.
Gene-expression studies can use changes in detected protein signals to examine whether protein output differs between samples. Biomarker research similarly benefits from comparing target signals and broader protein patterns. Because the analysis can focus on a selected protein or survey many bands, it connects molecular measurements with questions about expression, candidate markers, and biological sample composition.