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 …

Oct 18, 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 …

May 6, 2022 · An antibody is a protein produced by your immune system to attack and fight off these antigens. How do antibodies fight off antigens? The molecules on the surfaces of …

May 1, 2023 · Antibodies are naturally produced by plasma cells within the human body to mediate an adaptive immune response against invading pathogens. There are five …

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 …

Aug 11, 2021 · An antibody is a protein that develops in response to a foreign invader (the antigen). An antigen can be a protein, lipid, carbohydrate, or nucleic acid.

Apr 16, 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 …

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.

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.

Sep 17, 2022 · IgG is the most abundant antibody, accounting for 75%-80% of all antibodies in the body. It either tags an antigen for removal or it stimulates the production of toxins or other …