DISC ELECTROPHORESIS – II METHOD AND APPLICATION TO HUMAN SERUM PROTEINS*¶
Why this mattered¶
Davis’s 1964 paper mattered because it helped turn polyacrylamide gel electrophoresis from a specialized physical-chemistry technique into a practical analytical method for complex biological mixtures. “Disc electrophoresis” combined a discontinuous buffer system, sample stacking, and a polyacrylamide gel matrix to concentrate proteins into sharp zones before separation. For human serum proteins, this meant that many fractions could be resolved with far higher definition than was typical of earlier moving-boundary or paper electrophoresis methods, making protein heterogeneity visibly and reproducibly analyzable.
The paradigm shift was methodological: proteins could now be separated not merely as broad clinical classes but as discrete bands whose mobility reflected charge, size, and gel conditions. Davis’s emphasis on technical variables was central to that shift, because it made the method adjustable and reproducible rather than a one-off demonstration. After this, electrophoretic banding became a routine way to compare biological samples, detect abnormal serum protein patterns, purify fractions, and characterize enzymes and isoforms.
Its influence also runs through later breakthroughs in molecular biology and biochemistry. Disc electrophoresis was a direct ancestor of modern PAGE workflows, including SDS-PAGE, native gels, zymograms, and many protein analytical pipelines used before mass spectrometry became dominant. By making complex protein mixtures legible as band patterns, the Davis method helped establish gel electrophoresis as one of the core visual languages of twentieth-century molecular life science.
Abstract¶
S ummary The technique of disc electrophoresis has been presented, including a discussion of the technical variables with special reference to the separation of protein fractions of normal human serum.
Related¶
- enables → High resolution two-dimensional electrophoresis of proteins. — Disc electrophoresis supplied the polyacrylamide gel separation methodology that enabled high-resolution two-dimensional protein electrophoresis.
- enables → The Reliability of Molecular Weight Determinations by Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis — Ornstein and Davis's disc electrophoresis method supplied the polyacrylamide gel separation platform used to test SDS-PAGE molecular-weight reliability.
- enables → Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4 — Disc electrophoresis supplied the gel-separation method that Laemmli adapted into SDS-PAGE for resolving bacteriophage T4 structural proteins.
- cite ← High resolution two-dimensional electrophoresis of proteins. — O'Farrell's high-resolution two-dimensional electrophoresis extends earlier disc electrophoresis methods for separating complex protein mixtures.
- cite ← The Reliability of Molecular Weight Determinations by Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis — The SDS-PAGE molecular-weight study built on disc electrophoresis as the gel electrophoretic separation method for serum proteins.
- cite ← Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4 — The bacteriophage T4 paper builds on disc electrophoresis methodology for separating proteins during analysis of phage head assembly.