Antibody - Wikipedia
网页An antibody (Ab) or immunoglobulin (Ig) is a large, Y-shaped protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as bacteria and viruses, including those that cause disease.
Antibody | Definition, Structure, Function, & Types | Britannica
网页2024年9月23日 · Antibody, a protective protein produced by the immune system in response to the presence of a foreign substance, called an antigen. Antibodies recognize and latch onto antigens in order to remove them from the body. Learn more about the function and structure of antibodies in this article.
The structure of a typical antibody molecule - Immunobiology
网页Antibody molecules are roughly Y-shaped molecules consisting of three equal-sized portions, loosely connected by a flexible tether. Three schematic representations of antibody structure, which has been determined by X-ray crystallography, are shown in Fig. 3.1.
Antibody - Structure, Classes, Function | Britannica
网页2024年9月23日 · Antibody - Structure, Classes, Function: Each antibody molecule is essentially identical to the antigen receptor of the B cell that produced it. The basic structure of these proteins consists of two pairs of polypeptide chains (lengths of amino acids linked by peptide bonds) that form a flexible Y shape.
Antibody: Definition, Structure and Uses | Biology Dictionary
网页2018年4月22日 · An antibody is a specialized defense protein synthesized by the vertebrate immune system. These small structures are actually made of 4 different protein units. The ends of the molecule are variable, and can be adapted to bind to any molecule.
11.7A: Antibody Proteins and Antigen Binding - Biology LibreTexts
网页2022年12月24日 · An antibody (Ab), also known as an immunoglobulin (Ig), is a large protein produced by B-cells that is used by the immune system to identify and neutralize foreign objects, such as bacteria and viruses. The antibody recognizes a unique part of the foreign target, called an antigen.
Antibodies: Definition, Types & Function - Cleveland Clinic
网页2022年5月6日 · Antibodies are proteins that protect you when an unwanted substance enters your body. Produced by your immune system, antibodies bind to these unwanted substances in order to eliminate them from your system. Another word for antibody is immunoglobulin.
Antibody Structure - University of Arizona
网页Antibodies are immune system-related proteins called immunoglobulins. Each antibody consists of four polypeptides– two heavy chains and two light chains joined to form a "Y" shaped molecule. The amino acid sequence in the tips of the "Y" varies greatly among different antibodies.
Antibody: Definition, Structure, Types, Forms, Functions
网页2023年8月3日 · Antibodies are protein molecules naturally produced or synthesized by the B-lymphocytes. They are also known as Immunoglobulins. The use of the term antibody defines an Immunoglobulin molecule that has specificity for an epitope of the molecules that make up antigens.
20.6B: Structure and Function of Antibodies - Medicine LibreTexts
网页An antibody (formally called immunoglobulin) is a large Y-shaped glycoprotein produced by B-cells and used by the immune system to identify and neutralize pathogens. Antibodies are produced by B cells, and are either secreted into circulation or remain expressed on the surface of the B cell.