1 Note which cartridges need to be replaced and press OK. 2  Then select Yes, replace now and press OK. 3  If you are replacing a cartridge before you see a message on the LCD screen, press the left or right arrow buttons, select Setup OK Maintenance OK Ink Cartridge Replacement OK.
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.
What is an antigen? An antigen is any substance that is recognised as foreign and stimulates the production of antibodies, for example an antigen may be a âforeignâ protein on the surface of a bacterium. An antigen specifically induces the production of antibodies which can bind to it and neutralise it.