Each antibody binds to a specific antigen in a highly specific interaction analogous to a lock and key. An antibody (Ab), or immunoglobulin (Ig), is a large protein belonging to t

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 …

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 …

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.

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, …

Aug 3, 2023 · Each antibody has two light chains that are identical and only one of the two (lambda (λ) and kappa (κ)) light chains is present per antibody in mammals; therefore either of …

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.

Jul 30, 2025 · Each antibody fits precisely with a unique part of an antigen, called an epitope. This precise fit ensures that antibodies target only specific threats, leaving the body’s own healthy …

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.

Explore the function of antibodies in the immune system, how antibodies are used and produced in research, and how to choose the best antibody for you.