1 Scientists group these molecules into five major classes or isotypes—IgA, IgG, IgD, IgE, and IgM—according to the type of heavy chain they possess, where different isotypes vary in their function ...

Serum was stored at −80°C. IgM, IgD, IgA, IgG, IgG1, 2, 3, and 4, and total IgE were measured. Results: The following immunoglobulins were significantly (p⩽0.05) altered after the race: IgD, ...