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Antibody Structure

Antibody Structure

Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
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Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.

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Related Experiment Video

Updated: Mar 16, 2026

Laboratory Scale Production and Purification of a Therapeutic Antibody

Laboratory Scale Production and Purification of a Therapeutic Antibody

Published on: January 24, 2017

Engineering antibody therapeutics.

Mark L Chiu¹, Gary L Gilliland¹

¹Janssen Research & Development LLC, 1400 McKean Road, Spring House, PA 19477, USA.

Current Opinion in Structural Biology

|August 16, 2016

Summary

This summary is machine-generated.

Antibody engineering innovations have revolutionized protein therapeutics, leading to novel treatments with unique biological and biophysical properties for improved patient care.

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Area of Science:

Biotechnology
Immunology
Pharmaceutical Science

Background:

Antibody-based protein therapeutics have become a cornerstone of modern medicine.
Decades of research have driven significant advancements in antibody production and engineering.

Purpose of the Study:

To review current antibody production methods.
To explore how immunoglobulin knowledge fuels antibody engineering for novel therapeutics.
To highlight the impact of engineered antibodies on patient treatment.

Main Methods:

Review of current antibody production techniques.
Analysis of structural and functional characterization of immunoglobulins.
Examination of antibody engineering strategies, including variable region incorporation into diverse formats.

Main Results:

Engineered antibodies possess unique biological and biophysical properties.
Novel therapeutic approaches are emerging from antibody engineering.
Bi- and multi-specific antibody formats enhance therapeutic efficacy.

Conclusions:

Antibody engineering is critical for developing advanced protein therapeutics.
Understanding immunoglobulin structure and function is key to therapeutic innovation.
Engineered antibodies offer significant advantages for patient treatment and novel therapeutic strategies.