Antigen: Is a substance that can trigger

Antigen is a substance that can trigger an immune response in the body. It is typically a foreign substance, such as a microorganism, a toxin, or a particle, that the immune system recognizes as being "non-self" and potentially harmful. When the immune system encounters an antigen , it produces specific proteins called antibodies that can recognize and neutralize the antigen , or stimulate other immune cells to attack and destroy it What is Antigen ? By immunological definition, we can say that ... An antigen is a molecule that can bind to an antibody or a T-cell receptor and trigger an immune response. Learn about the structure, function, and classification of antigens, as well as their role in vaccines, allergies, and autoimmune diseases. Learn what antigens are, how they trigger immune responses, and what types of antigens exist. Explore the structure, properties, and examples of antigens with BYJU'S website. Antigen It is a substance usually protein in nature and sometimes polysaccharide, that generates a specific immune response and induces the formation of a specific antibody or specially sensitized T cells or both. Antigens are “targeted” by antibodies. An antigen may be a substance from the environment, such as chemicals, bacteria, viruses, or pollen or may also be from inside the body. In general, two main divisions of antigens are recognized: foreign antigens (or hetero-antigens) and ...