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.
Confidence votes 108. An antibody is a protein that your body produces which binds to the surface of a foreign body, like a bacteria or virus, and prevents it from actively damaging your body.Antibodies, generally bind other proteins, and they will bind to specific portions of the proteins. Answer   An antibody is what your body produces to fight of disease and infection. When a person has an autoimmune disease, the body's antibodies are attacking hea â¦ lthy and normal cells. 3 people found this useful.