Lupus Arthritis. Lupus arthritis causes pain, stiffness, swelling, tenderness and warmth in your joints. The joints most often affected are the ones farthest from the middle of the body, such as fingers, wrists, elbows, knees, ankles and toes.
Each antibody binds to a specific antigen; an interaction similar to a lock and key. An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shape protein produced by plasma cells that is used by the immune system to identify and neutralize pathogens such as bacteria and viruses.The antibody recognizes a unique molecule of the harmful agent, called an antigen, via the variable region.n antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shape protein produced by plasma cells that is used by the immune system to identify and neutralize pathogens such as bacteria and viruses.
Antibodies Defined. Antibodies are proteins that are produced by the immune system to help stop harm from occurring. They are also called immunoglobulins. When an intruder, such as a virus, bacteria, or other chemical, enters the body, the immune system springs into action.hemical signals are sent to alert all the different parts of the immune system into action. First, the B cell meets the antigen. The B cell will create the antibody protein and stick it to the antigen. Next comes the T cells that begin to destroy the antigen.