Antigen fortune telling _ What is antigen testing?

Antibody is a large Y-shaped protein secreted by plasma cells (effector B cells), which is used by the immune system to recognize and neutralize foreign substances, such as bacteria and viruses. It only exists in the blood and other body fluids of vertebrates and on the surface of B cell membrane.

Antibodies can recognize the unique characteristics of specific foreign objects, which are called antigens.

Antibody is an immunoglobulin, which can specifically bind to antigen.

Antibodies can be divided into lectin, sedin, antitoxin, lysin, opsonin, neutralizing antibody and complement binding antibody according to their reaction forms.

According to the source of antibody production, it can be divided into normal antibodies (natural antibodies), such as ABO blood group anti-A, anti-B antibodies, and anti-microbial antibodies and other immune antibodies.

According to the source of reactive antigen, it can be divided into heterologous antibody, heterophilic antibody, homologous antibody and autoantibody. According to the agglutination state of antigen reaction, it can be divided into complete antibody IgM and incomplete antibody IgG.