Gamma globulins are a class of globulins, identified by their position after serum protein electrophoresis. The most significant gamma globulins are immunoglobulins (“Igs”), more commonly known as antibodies, although some Igs are not gamma globulins, and some gamma globulins are not Igs. Aalto’s purified human gamma globulins can be used to spike into serum to elevate the IgG concentration.