5 Types of Immunoglobulins Mnemonic

Immunoglobulins exist in five types—IgA, IgD, IgE, IgG, and IgM.
Each type serves a particular function:

• IgA, IgG, and IgM guard against viral and bacterial invasion.
• IgD acts as an antigen receptor of B cells.
• IgE causes an allergic response.