Antigens
_____ are substances that can be specifically recognized by the immune system
Antigens are molecules found on the surface of cells or particles that can be recognized by the immune system as foreign and potentially harmful. They can trigger the immune system to produce an immune response, which can lead to the production of specific antibodies that can recognize and neutralize the antigen.
Antigens are typically proteins or carbohydrates, but can also be lipids or nucleic acids. They can come from a variety of sources including bacteria, viruses, fungi, and parasites, as well as foreign substances such as drugs or chemicals.
In addition to triggering an immune response, antigens can be used for diagnostic purposes. Detection of specific antigens can indicate the presence of a particular disease or infection. Antigens can also be used in vaccine development, where they are used to stimulate an immune response and provide protection against the disease they represent.
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