It is the B-cells.
Antibodies and /or anti - antigen.
antibodies
an aepitope is the part of an antigen where antibodiy or lymphocyte receptor binds
Monoclonal antibodies are commonly used to fight a large number of diseases including cancer. The monoclonal antibodies fight the disease by targeting a certain antigen and recruiting the body's natural immune system to destroy the antigen-infected cells.
lymphocytes make antibodies by first getting the antigen marker from a pathogen. Then, using a 'toolkit' of various protein fragments, they use the marker as a 'blueprint' to make the antibody.
Antibodies are specific. This means that they "match" the infesting disease (antigen). The antigen causes the immune system to make the antibodies which will attack the disease. Without the antibodeis, the body will not be able to fight off and destroy the disease.
Antibodies
No, antibodies are produced by your body to fight infection.
An antigen is a body's system for creating antibodies to fight infection. A pathogen is an infectious agent (or germ).
Function of Antibodies is to fight against the antigens to protect the body
When you get a disease and fight it off, your body produces specific antibodies for that disease, tiny organisms meant for that specific disease. While those antibodies remain in your system, you can't contract that same disease again. Vaccinations are modified versions of the disease that they wish to produce immunity against. They produce a very toned-down effect of the actual disease, but cause your body to create the same antibodies, as if you'd had the real thing.
Generally, the first body cell to encounter an antigen is a specific type of white blood cell called a macrophage. The macrophage partially digests the antigen and presents some of the antigens proteins on its surface. This is known as antigen presentation. Once the macrophage has presented the proteins, helper T cells recognize these proteins and search for a B cell that is able to produce the needed antibodies. The T cell chemically communicates with the B cell which, upon activation, undergoes a series of cell divisions. B plasma cells and B memory cells are produced. The B plasma cells produce antibodies needed to fight the antigen while the B memory cells circulate in the bloodstream and are available in case of future infection.