Antibody - Wikipedia
The term antibody generally refers to the free (secreted) form, while the term immunoglobulin can refer to either forms. Since they are, broadly speaking, the same protein, the terms are often …
Antibody | Definition, Structure, Function, & Types | Britannica
Dec 13, 2025 · 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 …
Antibodies: Definition, Types & Function - Cleveland Clinic
What do antibodies look like? Each antibody structure consists of two heavy chains and two light chains, which join to form a Y-shaped molecule. Each type of antibody has a different amino …
Antibodies: Definition, Types, and Function - Health
Sep 25, 2025 · IgG: The most abundant antibody found in the body. It can help to block infections caused by bacteria, viruses, parasites, or other disease-causing organisms.
Antibody: MedlinePlus Medical Encyclopedia
Jul 23, 2024 · An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens. Examples of antigens include microorganisms (bacteria, …
The 5 Types of Antibodies - Verywell Health
Nov 26, 2025 · Antibody tests do not detect the actual pathogens that cause an infection—they detect the antibodies that are produced in response to the infection. A positive result means …
Antibody - National Human Genome Research Institute
1 day ago · An antibody is a protein component of the immune system that circulates in the blood, recognizes foreign substances like bacteria and viruses, and neutralizes them.