QS Study


An antibody is a type of globulin (Immunoglobulin) produced in response to an antigen with which it reacts specifically. They are Y-shaped proteins that are produced by the immune system to help stop intruders from harming the body.

The production of antibodies is a main function of the immune system and is carried out by a type of white blood cell called a B cell (B lymphocyte). Antibodies can be triggered by and directed at foreign proteins, microorganisms, or toxins. Some antibodies are autoantibodies and home in against our own tissues.


The antibodies act sort of like the immune system’s scouts. They find antigens, stick to them, and identify for the immune system the exact type of antigen so that it can be destroyed.

The antibody ties to particular antigens. This signals the other cells of the immune system to get rid of the invading microbes. The potency of binding between the antibody and an antigen at a sole binding site is known as the antibody’s affinity for the antigen.