An antibody is a protein part of the immune system that circulates in the blood, acknowledges foreign substances like infections and microorganisms, and neutralizes them. It's made by a particular type of leukocyte that's called a B cell. The framework of the antibody consists of two light chains and two hefty chains, and at the very tip of the antibody is a hypervariable region, and this hypervariable region permits the antibody to make different types of antibodies that will reply to all of the antigens that will attack the body. An antigen is anything that is foreign to the human body. Therefore you can have in certain instances where your own body will make antibodies against parts that belong to you.
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