Improved method for fractionating gamma-glutamyltransferase by electrophoresis on cellulose acetate.

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Abstract
I describe a method of fractionating gamma-glutamyltransferase on cellulose acetate. The tracing is obtained in parallel with that of serum protein, and the gamma-glutamyltransferase bands are characterized by correspondence with the major protein fractions. The overall pattern of the isoenzyme activity in normal sera is one of activity in the alpha1- and alpha2-globulin regions. In hepatic diseases four bands are usually present, but some more specific observations are possible, e.g., the presence of an intense beta-globulin band in occlusive icterus, intra- or extrahepatic, and a marked alpha2-globulin band in alcoholism. The potentialities of this technique as a diagnostic and prognostic aid together with its simplicity prompt me to recommend its use in the clinical laboratory.

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