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.
A Discovery Health answered. Antibodies (also called immunoglobulins and gammaglobulins) are produced by white blood cells. Antibodies are Y-shaped proteins that respond to a specific antigen (bacteria, virus or toxin).Every antibody has a special section (located at the tips of the Y branches) that is sensitive to a specific antigen and can bind to it.hen an antibody binds to a virus particle's outer coat or the cell wall of a bacterium it can stop the virus or bacterium's movement through cell walls. A large number of antibodies can latch on to an invader and signal the complement system that it must remove that invader.