How are antibody molecules and receptor molecules similar?

Antibody molecules and receptor molecules are both proteins that play crucial roles in the immune system and cellular signaling, respectively. They share structural similarities, such as the presence of binding sites that allow them to recognize and bind specific targets, like antigens for antibodies and ligands for receptors. Both types of molecules also undergo conformational changes upon binding, which can trigger downstream signaling processes or immune responses. Additionally, their specificity and diversity are vital for their functions in recognizing a wide range of targets.