Final answer:
An antigen is the protein that prompts the production of antibodies that identify foreign substances for destruction by the immune system.
Step-by-step explanation:
The protein that prompts the creation of antibodies is known as an antigen. Antigens are usually foreign substances such as bacteria, viruses, or proteins that stimulate the body's immune response, leading to the production of antibodies by the plasma cells. These antibodies bind specifically to these antigens, marking them for destruction by the immune system. An antigen is the protein that prompts the production of antibodies that identify foreign substances for destruction by the immune system.
Learn more about Antigens and Antibodies