Antibody - Wikipedia
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
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.

Physiology, Antibody - StatPearls - NCBI Bookshelf
Follow NCBI. Antibodies are naturally produced by plasma cells within the human body to mediate an adaptive immune response against invading pathogens. There are five predominant antibodies produced, each specialized to execute certain functions.

Antibody - Structure, Classes, Function | Britannica
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
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.

What Is an Antibody? - ScienceAlert
An antibody is a class of protein called an immunoglobulin, which is made by specialised white blood cells to identify and neutralise material foreign to an immune system.

Antibody: Definition, Structure, Types, Forms, Functions
Antibody (Immunoglobulin) diversity. The immune system has the ability to generate a high level of diversity in order to recognize a very vast range of unique molecules estimated to be in billions. With this capability, foreign structural, foreign antigens can be recognized and eliminated.