What Are Antibodies?

Antibodies: Immunoglobulins produced by plasma cells differentiated by B cells under the stimulation of antigenic substances by the body and capable of specifically binding to the corresponding antigens. Antigens stimulate the body to produce antibodies. An antigen may be a protein, but an antibody must be a protein. However, the antibodies produced may be seen as an "antigen" in another organism. Thus it (antibody) can produce another antibody in the body. The antibody is called "anti-antibody".