However other methods have been used for IP, for example, mouse anti-human immunoglobulin E (IgE) and anti-human immunoglobulin G (IgG) have been used to test IgE- and IgG-specific epitopes in peanut allergies (3), and goat anti-human kappa and antihuman lambda antibodies have been used to test different epitopes discovered between different types of antibody light chains (11). Here, IGHE is linked to peanut allergic reaction.