Are amino acids the main building block of antibodies?

Amino acids are the main building blocks of proteins, including antibodies. Antibodies are a type of protein produced by the immune system in response to the presence of foreign substances, such as bacteria or viruses. Antibodies bind to specific antigens, which are molecules on the surface of foreign substances, and help the immune system destroy them. Antibodies are made up of two heavy chains and two light chains, which are all composed of amino acids. The amino acid sequence of an antibody determines its specificity for a particular antigen.