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.
Rating Newest Oldest. Best Answer: Antibodies are proteins produced by B-lymphocytes (B-cells), cells of the immune system. In the body, antibodies bind to target molecules (antigens) present on foreign objects that enter the body, such as pollen or bacteria. The target molecules are often but not always proteins.n the body, antibodies bind to target molecules (antigens) present on foreign objects that enter the body, such as pollen or bacteria.