antigenic « Back to Glossary IndexA macromolecule, often a protein, that causes an immune response in a host. Related Articles: 14 – 4 Pathogenic outcomes15 – 4 The Immune System Is a Complex Collection of Organs, Tissues, and Cells16 – 2 Adaptive Immunity – introductory concepts16 – 3 B Lymphocytes – Humoral Immunity16 – 6 Errors of the Immune System« Back to Glossary Index