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 treated as …

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 acid sequence …

Jan 23, 2026 · 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 …

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 responses to …

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 the chains can …

Learn what an antibody is, how it works in the immune system, the main antibody types, and their uses in vaccines, diagnostics, and medical therapies.

Antibody and Antigen Explore the difference between antibodies and antigens and their role in immune memory.

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.

5 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.