Question: is igm the same as m protein?
Answer: Types of M Proteins There are five kinds of heavy chains, called IgG, IgA, IgD, IgM, and IgE. There are two types of light chains, called kappa and lambda. The most common type of M protein in myeloma is IgG. High levels of IgM suggest you may have Waldenstrom's macroglobulinemia.