Capillary Western
Capillary Western - Related Videos
11:43
The Fastest Western in Town: A Contemporary Twist on the Classic Western Blot Analysis
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Cited by 30 •
2014
This protocol explores the latest advancements in performing Western blot analyses. These novel modifications employ a Bis-Tris gel system with a 35 min electrophoresis run time, a 7 min dry blotting transfer system, and infrared fluorescent protein detection and imaging that generates higher resolution, quality, sensitivity, and improved accuracy of Western data.
08:48
The Western Blot
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2023
Western Blotting is used to identify the presence of specific proteins in electrophoretically separated samples. Following separation by a technique known as sodium dodecyl sulfate polyacrylamide gel electrophoresis, or SDS-PAGE, western transfer is used to move proteins from a polyacrylamide gel onto a piece of membrane which traps the proteins in their respective locations. Next, the membranes are probed with antibodies in a process called immunboblotting. Immunoblotting uses...
08:50
Capillary Electrophoresis (CE)
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
07:45
Western Blotting: Sample Preparation to Detection
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Cited by 49 •
2010
Western blotting is an analytical technique used to detect specific proteins in a given sample of tissue homogenate or extract.
01:15
Western Blotting
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2023
Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples. The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
FAQs
An electric field first separates proteins by size within a narrow capillary. The separated proteins are then immobilized directly to the capillary wall, creating a fixed presentation for antibody probing. This arrangement combines size-based resolution with in-capillary detection and distinguishes the workflow from slab-gel formats.
The primary antibody provides molecular specificity by recognizing the protein of interest after separation and immobilization. A labeled secondary antibody then enables signal generation through either chemiluminescent or fluorescent detection. Together, these antibody steps allow the assay to distinguish selected proteins from the broader sample and produce a measurable output.
Compared with slab-gel Western blotting, Capillary Western offers an automated, streamlined workflow that requires very small biological samples. Its standardized processing and quantitative output can reduce variability between analyses, which is valuable when sample availability is limited or when experiments require consistent measurements across multiple neural specimens.
Phosphorylation states can provide information about signaling proteins beyond total protein abundance. Measuring them alongside targets such as receptors or disease-related biomarkers helps investigators examine molecular changes associated with neural development, plasticity, and neurodegeneration. The method therefore supports focused analysis of signaling-related protein changes in neuroscience samples.
The workflow begins with a very small biological sample, followed by size-based protein separation inside a capillary. An electric field immobilizes the separated proteins on the capillary wall. Primary and labeled secondary antibodies are then applied, and chemiluminescent or fluorescent detection generates the assay's quantitative protein measurement.
In neuroscience, the method can be applied to brain tissue, cultured neurons, and limited clinical specimens. This flexibility is especially relevant when only small amounts of material are available. Analyses may focus on signaling proteins, phosphorylation states, receptors, or disease-related biomarkers connected with neural development, plasticity, or neurodegeneration.
Capillary Western provides quantitative measurements of selected proteins rather than only a qualitative signal. Investigators can use those measurements to assess signaling proteins, receptor abundance, phosphorylation states, and disease-related biomarkers. Because the workflow is standardized, results can support more reproducible comparisons among brain, neuronal, or limited clinical samples.