DB Module 7 1. Define and describe the action of Antigens 2. Define and describe the action of Antibodies Discuss ONE of the five subclasses of antibodies; predominant location and action(s) • Immunoglobulin A (IgA) • Immunoglobulin G (IgG) • Immunoglobulin M (IgM) • Immunoglobulin E (IgE) • Immunoglobulin D (IgD)