1. 1.|A method of acrylamide-gel electrophoresis using a discontinuous gel system was devised for the analysis of collagen polymer components. 2. 2.|With this method, the α, β, and γ components are well resolved and separate into their distinct regions. A 'pre α' region and a 'higher-polymer' region can also be discerned in some samples. 3. 3.|Comparisons among the gel patterns of three bovine corium collagens (neutral-salt-soluble, acid-soluble, and an alcohol-water-coacervated fraction) have been made by running two samples on the same gel. Differences in the migration rates of similar components of these collagens indicate fundamental differences between the various soluble collagens. 4. 4.|By varying the gel column size and composition, and by making use of the apparent sharpening of boundaries as they pass gel concentration discontinuities, the resolution of this electrophoretic technique can be sufficiently improved so that the differences between both the high and low molecular weight components of similar collagens can be investigated.
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