PubMed · 163154
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D S Fredrickson. 1975. It's time to be practical.. https://doi.org/10.1161/01.cir.51.2.209
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Two allotypes have been identified for each of the IgG subclasses IgG1, IgG2 and IgG3. These allotypes are referred to as G1m(a) and G1m(f), G2m(n) and G2m(-n), and G3m(g) and G3m(b). Using a pool of normal human serum and a combination of preparative electrophoresis, DEAE ion-exchange and protein A-Sepharose chromatography, it was possible to separate G1m(f) from G1m(a), G2m(-n) from G2m(n) and G3m(g) from G3m(b). Purification of G2m(-n) molecules is of special interest as no genetic marker has been found to identify this allotype.
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