Proteins play a crucial role in the immune response by functioning as antibodies, which recognize and neutralize pathogens like bacteria and viruses. These proteins are produced by B-cells in response to specific antigens. Besides antibodies, proteins also include cytokines, which help regulate immune cell communication and activity. They facilitate the activation and proliferation of T-cells, enhancing the body’s defense mechanisms. Overall, proteins are integral for recognizing foreign invaders and orchestrating an effective immune response.