A type of globulin in plasma that in electrically charged solutions exhibits slowest colloidal mobility after that of the alpha and beta globulins. All immunoglobulins belong to this group of serum protein.

Serum globulins that migrate in the gamma region on electrophoresis; gamma-globulin at one time was used as a synonym for immunoglobulin, since most immunoglobulins are gamma globulins; however since some immunoglobulins exhibit an alpha or beta electrophoretic mobility, that usage is in decline.

(gamma-globulins) Serum globulins that migrate to the gamma region (most positively charged) upon ELECTROPHORESIS. At one time, gamma-globulins came to be used as a synonym for immunoglobulins since most immunoglobulins are gamma globulins and conversely most gamma globulins are immunoglobulins. But since some immunoglobulins exhibit an alpha or beta electrophoretic mobility, that usage is in decline.

Gamma globulin, subgroup of the blood proteins called globulins. In humans and many of the other mammals, antibodies, when they are formed, occur in the gamma globulins. Persons who lack gamma globulin or who have an inadequate supply of it--conditions called, respectively, agammaglobulinemia and...