Polyacrylamide gels constitute a generally better matrix for routine electrophoresis of serum proteins than other media commonly employed, but the immunoglobulin fractions of the largest size may not migrate into gels in which the acrylamide concentration exceeds 5%. To facilitate adequate separation, slabs containing a semi-solid layer were prepared from discontinuous gels consisting of 2 to 8% acrylamide. Serum samples were subjected to electrophoresis, under carefully controlled conditions at pH 9·0, by means of a pulsed constant power supply.
The method provided a rapid, reproducible, and relatively simple technique for the study of human serum proteins, either by electrophoresis or by immunoelectrophoresis, and for differentiation of serum samples from various animal species.
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