Capture Antibody Binding
Capture Antibody Binding - Related Videos
15:27
Determination of High-affinity Antibody-antigen Binding Kinetics Using Four Biosensor Platforms
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Cited by 30 •
2017
We describe here protocols for the measurement of antibody-antigen binding affinity and kinetics using four commonly used biosensor platforms.
08:40
Methyl-binding DNA capture Sequencing for Patient Tissues
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Cited by 1 •
2016
Here we present a protocol to investigate genome wide DNA methylation in large scale clinical patient screening studies using the Methyl-Binding DNA Capture sequencing (MBDCap-seq or MBD-seq) technology and the subsequent bioinformatics analysis pipeline.
14:48
Conversion of a Capture ELISA to a Luminex xMAP Assay using a Multiplex Antibody Screening Method
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Cited by 53 •
2012
An ELISA can be easily converted to a Luminex xMAP assay and, through the benefits of multiplexing, several antibodies can be screened simultaneously to identify an optimum antibody pair, resulting in increased sensitivity and dynamic range, while reducing assay cost.
17:12
Profiling of Methyltransferases and Other S-adenosyl-L-homocysteine-binding Proteins by Capture Compound Mass Spectrometry (CCMS)
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Cited by 13 •
2010
Capture Compounds are trifunctional small molecules to reduce the complexity of the proteome by functional reversible small molecule-protein interaction followed by photo-crosslinking and purification. Here we use a Capture Compound with S-adenosyl-L-homocysteine-binding as selectivity function to isolate methyltransferases from an Escherichia coli whole cell lysate and identify them by MS.
04:43
Antibody Conjugated Nanoparticle-based Quantification Using Dark Field Microscopy: A Procedure to Capture and Quantify Specific Exosomes from Body Fluids
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2023
This video describes the use of low-magnification, dark-field microscopy to quantify specific exosomes in small volume biofluidic samples. The exosomes thus identified can serve as potential cancer biomarkers.
FAQs
A sandwich arrangement uses two recognition events for the same target. The capture antibody retains the antigen, while the detection antibody recognizes another epitope on that antigen. This links antigen retention to a labeled signal and helps identify the intended target among components present in a biological sample. The two antibodies must recognize compatible, accessible regions.
Signal generation depends on formation of an antibody-antigen-antibody arrangement. Once the capture antibody retains the target, a labeled detection antibody binds a second epitope, connecting the captured molecule to a detectable output. The measured signal therefore provides a way to estimate or compare the amount of target retained in different biological samples.
Specificity is governed by complementary molecular interactions between the capture antibody and its target epitope. Detection also requires a second antibody to recognize a separate, accessible epitope on that target. If this paired recognition is not possible, retention alone cannot produce the intended sandwich-associated signal, making antibody-pair compatibility central to the assay.
A typical workflow begins by immobilizing the capture antibody, then exposing it to a biological sample so the target can be retained. A labeled detection antibody is subsequently introduced to recognize another epitope. The assay outcome is obtained by measuring the resulting signal and relating it to the amount of captured target.
Serum and culture fluids are among the specimen types supported by this approach. Depending on the research question, the measured target may be a pathogen component, an antibody, or an immune mediator. This breadth allows the same binding principle to address infectious agents, host immune responses, and measurable biomarkers in biological samples.
In infection research, the method provides a measured readout for diagnostic testing, biomarker analysis, and evaluation of host responses. Investigators can focus on pathogen components to examine infection-related material, or measure antibodies and immune mediators to characterize the response of the host. The resulting signal supports detection and comparison of these targets in specimens.