The immune response is a defense mechanism comprised of a complex network of interacting molecules and cells that recognize and respond to agents foreign to the individual. This course focuses on the biochemical mechanisms that act at the molecular and cellular levels to regulate this process. Textbook readings will be supplemented with original literature. Format: lecture and discussion, three hours per week. Evaluation will be based on exams, a research paper, written assignments, an oral presentation, and class participation. Prerequisites: Biology 202. Enrollment limit: 12 (expected:12). Open to Biology majors, with preference given to senior Biology majors.