Antibody-enzyme Conjugate
Antibody-enzyme Conjugate - Related Videos
02:57
Enzyme-Linked Immunosorbent Assay to Verify Chemically-Coupled Antibody-Antigen Conjugates
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2025
This video demonstrates the detection of chemically conjugated antibody-antigen complexes via the sandwich enzyme-linked immunosorbent assay, or ELISA, technique. The captured antibody binds to the specific epitope of the antigen of the antibody-antigen conjugate, which can be later visualized using an enzyme-linked secondary antibody.
04:59
Evaluating the Intracellular Distribution of Virus-Derived Peptide-Modified Antibody Conjugates
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2025
This video demonstrates the process of assessing the intracellular distribution of virus-derived peptide-modified antibody conjugates using confocal microscopy. The viral-derived nuclear localization sequence directs antibody-conjugates within the cytoplasm, confirmed through immunostaining and fluorescence measurement.
03:20
Quantifying Bacterial Alginate Using an Antibody-Based Enzyme-Linked Immunosorbent Assay
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2025
Source: Al Ahmar, R., et al. Culture of Small Colony Variant of Pseudomonas aeruginosa and Quantitation of its Alginate. J. Vis. Exp. (2020)This video demonstrates a colorimetric immunoassay to quantify alginate, a protective exopolysaccharide produced by Pseudomonas aeruginosa. The procedure involves coating a microplate with the sample, applying specific antibodies, and using an enzyme-substrate reaction to generate a measurable color change. A standard curve is then used to determine the...
11:58
Initial Evaluation of Antibody-conjugates Modified with Viral-derived Peptides for Increasing Cellular Accumulation and Improving Tumor Targeting
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Cited by 5 •
2018
Viral-derived peptides coupled to antibody-conjugates (ACs) is an approach gaining momentum due to the potential of delivering molecular payloads with increased tumor cell accumulation. Utilizing common methods to evaluate peptide conjugation, AC and payload intracellular accumulation, and tumor targeting, this protocol helps researchers during the key initial development phases.
02:50
Conjugated Proteins
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2020
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties. Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
FAQs
The antibody provides molecular recognition by binding the selected antigen, whereas the enzyme provides a mechanism for generating a measurable signal. Keeping these roles linked allows antigen recognition to be translated into a colored, fluorescent, or luminescent readout. This combination lets researchers connect the presence of a specific protein with its location or measured abundance in a biological sample.
The substrate is selected so the attached enzyme converts it into a detectable product. Depending on that substrate and detection format, the result may be colored, fluorescent, or luminescent. This choice affects how researchers visualize or measure antigen-associated signal, allowing the same recognition principle to support spatial observation in specimens or quantitative analysis in related assays.
Spatial information shows where a target protein occurs within an embryo, tissue, or cell population rather than indicating only that it is present. The resulting distribution can reveal differences among regions or cell groups associated with differentiation, migration, signaling, and tissue organization. This makes the conjugate useful for relating molecular expression patterns to the physical progression of development.
Distinct signal distributions can help researchers compare protein expression across embryos, tissues, or cell populations. Such comparisons may identify patterns associated with differentiating cells, migrating populations, signaling regions, or developing tissue structures. The value lies in connecting target localization with developmental organization, providing spatial evidence that complements broader measurements of molecular presence.
A typical workflow applies the conjugate to a biological sample, allows the antibody portion to bind its target antigen, and then supplies a suitable substrate for the linked enzyme. The reaction produces a detectable signal that can be observed or measured. In developmental studies, the sample may be an embryo, tissue, or defined cell population.
Researchers may choose this reagent when they need to map the distribution of a specific protein across developing material. Immunohistochemistry and related assays can use the resulting signal to examine embryos, tissues, or cell populations. This approach is especially relevant when developmental questions concern where differentiation, migration, signaling, or tissue organization is occurring.
The detected product indicates where the antibody recognized its antigen and provides a visible or measurable representation of that target. Across a sample, differences in signal location can reveal patterned protein expression among regions or cell groups. Interpreted in developmental context, these patterns provide spatial evidence for how developmental programs unfold.
By marking the distribution of a selected antigen, the conjugate can show whether associated signal appears in particular cell populations or tissue regions. Comparing those locations across developmental samples can help relate protein expression to cell movement and changing tissue arrangement. The method therefore supplies molecularly linked spatial information for investigating organization during development.