A protein produced by the immune system that attacks a harmful agent, such as a virus or bacteria.
A protein produced by the immune system that attacks a harmful agent such as a virus or bacteria. They are highly specific, each type of antibody being effective against only one particular antigen. They are produced by specialised white blood cells called B lymphocytes. An antibody works either by helping cells called phagocytes, which identify and ingest an invader, or by attacking it directly.
They are highly specific, each type of antibody being effective against only one particular antigen. They are produced by specialised white blood cells called B lymphocytes. An antibody works either by helping cells called phagocytes, which identify and ingest an invader, or by attacking it directly.