Take Home Lessons What is the basic immunoglobulin structure? What are the characteristics or features of the various fragments of the immunoglobulin molecule? How is the specificity of an antibody "defined" by the amino acid sequence of the immunoglobulin molecule? What features distinguish each immunoglobulin class?Take Home Lessons ◼ What is the basic immunoglobulin structure? ◼ What are the characteristics or features of the various fragments of the immunoglobulin molecule? ◼ How is the specificity of an antibody “defined” by the amino acid sequence of the immunoglobulin molecule? ◼ What features distinguish each immunoglobulin class?