Antigens and antibodies
How can the proteins on the surface of cells, called antigens, help the body's immune system to identify pathogens? Use the following slides to introduce antigens and antibodies Antigens & antibodies An antigen is a chemical which stimulates the production of an antibody when it is inside the body. Usually proteins, antigens are found on the surface of cells. All cells have antigens on their surface. Eukaryote and...