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 …

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 …

2 days ago · Understand the structure and diverse roles of antibodies, the key immune proteins essential for pathogen neutralization and medical diagnostics.

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, …

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.

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 …

4 days 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.

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.

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.