Which immunoglobulin is responsible for an anaphylactic reaction?

The immunoglobulin responsible for an anaphylactic reaction is IgE. This type of antibody is primarily associated with allergic responses and plays a crucial role in the body's defense against parasites. During an allergic reaction, IgE binds to allergens and triggers the release of histamines and other chemicals from mast cells and basophils. This response results in the symptoms of anaphylaxis, which can include difficulty breathing, swelling, and a drop in blood pressure. The presence of IgE in high concentrations in individuals with allergies highlights its significant role in mediating severe and immediate hypersensitivity reactions.