Fc Region
Fc Region - Related Videos
03:03
Measuring the Activation of Fc-Mediated Effector Functions by HA Antibodies
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2025
This video demonstrates an assay measuring the antibody-mediated activation of T cell effector functions. Adding an influenza virus hemagglutinin (HA)-specific monoclonal antibody to transfected mammalian cells expressing HA results in the formation of immune complexes with HA. Upon introducing engineered T cells expressing Fc receptors and a luciferase reporter, the T cells are activated by the antibody-HA complexes, and this activation is detected by adding a luciferase substrate and...
03:32
An In Vitro Artificial Activation Assay for Studying Fc Receptor Activation by Antibodies
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2025
This video demonstrates FcγRIIIa-driven events initiated by therapeutic antibodies in human natural killer cells. The artificial stimulation platform facilitates the exploration of downstream effector functions, encompassing cytoskeletal rearrangement, degranulation, chemokine/cytokine production, and signaling pathways mediated by the FcγRIIIa and Fc portions of antibodies involved in binding.
10:33
Isolation and Characterization Of Chimeric Human Fc-expressing Proteins Using Protein A Membrane Adsorbers And A Streamlined Workflow
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Cited by 3 •
2014
Compared with traditional affinity chromatography using protein A agarose bead-packed columns, protein A membrane adsorbers can significantly speed laboratory-scale isolation of antibodies and other Fc fragment-expressing proteins. Appropriate analysis and quantification methods can further accelerate protein processing, allowing isolation/characterization to be completed in one workday, instead of 20+ work hours.
04:47
A Method to Assess Fc-mediated Effector Functions Induced by Influenza Hemagglutinin Specific Antibodies
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Cited by 6 •
2018
We describe a method to measure the activation of Fc-mediated effector functions by antibodies that target the influenza virus hemagglutinin. This assay can also be adapted to assess the ability of monoclonal antibodies or polyclonal sera targeting other viral surface glycoproteins to induce Fc-mediated immunity.
01:03
IR Frequency Region: Fingerprint Region
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2024
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1. The...
FAQs
After the Fab region recognizes an antigen, the Fc region serves as the interaction site for Fc receptors on immune cells. That binding can initiate effector activities, including phagocytosis, cellular cytotoxicity, or inflammation. Consequently, Fc receptor engagement determines how antigen recognition is translated into a particular immune response.
Glycosylation can alter how the Fc region binds immune-cell receptors and complement proteins. These carbohydrate features therefore influence the strength or character of downstream immune activity rather than acting as merely structural decoration. Examining glycosylation helps explain differences in antibody behavior, including receptor interactions, immune effects, and distribution within biological systems.
Fab and Fc regions contribute different information to antibody function. The Fab region supplies target recognition, whereas the Fc region determines which immune-system interactions can follow that recognition. This division allows researchers to examine antigen binding separately from effector behavior, an important distinction when analyzing immune regulation or designing antibody-based interventions.
Complement recruitment provides a second route by which Fc-mediated recognition can produce immune effects. In this pathway, Fc interactions with complement proteins can contribute to inflammation and other effector responses, while Fc-receptor engagement connects antibodies directly with immune cells. Considering both routes is important when interpreting the overall activity of an antibody.
In antibody-based assays, investigators can study Fc-dependent interactions to determine how antibodies communicate with immune components after target binding. The Fc region is also relevant to vaccine research because its properties affect immune activity. These applications extend analysis beyond whether an antibody recognizes a target, addressing what biological response that recognition may elicit.
Therapeutic antibody development may modify Fc properties to enhance or reduce selected biological effects. Such engineering focuses on how the region interacts with Fc receptors and complement, while also considering glycosylation and antibody distribution. The intended outcome is a more controlled immune profile suited to the therapeutic objective rather than an unchanged, general effector response.