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Which types of proteins help defend the body against foreign agents like bacteria?

Sagot :

Antibodies
Antibodies are a kind of protein that gets secreted by B lymphocytes of the immune system, and each antibody is going to be specific to one epitope. Once the antibody finds its specific target, such as the surface of a pathogenic bacteria, other cells in the immune system will perform a certain function depending on the kind of antibody.