EVERYDAY SCIENCE

Detailed explanation-1: -An antigen is any kind of marker-like a protein or string of amino acids-that your immune system can recognize. If this definition seems a little vague to you, you’re not alone. Let’s dig in further. Antigens are usually proteins or sugars (polysaccharides) found on the outside of things like cells or viruses.

Detailed explanation-2: -An antigen is any substance that causes your immune system to produce antibodies against it. This means your immune system does not recognize the substance, and is trying to fight it off. An antigen may be a substance from the environment, such as chemicals, bacteria, viruses, or pollen.

Detailed explanation-3: -Proteins or glycoproteins are considered as the most suitable antigens due to their ability to generate a strong immune response; in other words, they are strongly immunogenic.

Detailed explanation-4: -Any substance that induces the immune system to produce antibodies against it is called an antigen. Any foreign invaders, such as pathogens (bacteria and viruses), chemicals, toxins, and pollens, can be antigens. Under pathological conditions, normal cellular proteins can become self-antigens.

Detailed explanation-5: -An antigen is a foreign substance that enters your body. This can include bacteria, viruses, fungi, allergens, venom and other various toxins. An antibody is a protein produced by your immune system to attack and fight off these antigens.