Antibodies are specialized proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses. When an antibody binds to a cell receptor, it typically does so through a specific interaction between the antibody's variable region and the receptor's binding site. 1. Specificity: Each antibody has a unique structure that allows it to bind to a specific antigen (the target). This specificity is crucial for the immune response. 2. Binding Mechanism: The bindin