Field-inversion gel electrophoresis
First Claim
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1. An electrophoresis method to effect differential net migration, the extent of said migration being dependent on molecular size, of electrically charged macromolecular substances through a gel support in a single dimension, which method comprises:
- subjecting electrically charged macromolecular substances selected from the group consisting of DNA, RNA, and detergent-protein complexes applied to a gel support to the repeated inversion of an electrical field along a single dimension, wherein the repeated inversion comprises cycles each consisting essentially of a first voltage in one direction of polarity for a first time interval, and a second voltage in the opposite direction of polarity for a second time interval,wherein the migration effected by the total first voltages and first time intervals over all cycles does not equal the migration effected by the second voltages and second time intervals over all cycles, thus resulting in a net differential migration of said substances.
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Abstract
Disclosed herein is a method and apparatus for gel electrophoresis which employs periodic inversion of the electric field essentially in one dimension. According to this system, which is defined herein as field-inversion gel electrophoresis, net migration is achieved by using a longer time or higher voltage in one direction than in the other direction.
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Citations
20 Claims
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1. An electrophoresis method to effect differential net migration, the extent of said migration being dependent on molecular size, of electrically charged macromolecular substances through a gel support in a single dimension, which method comprises:
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subjecting electrically charged macromolecular substances selected from the group consisting of DNA, RNA, and detergent-protein complexes applied to a gel support to the repeated inversion of an electrical field along a single dimension, wherein the repeated inversion comprises cycles each consisting essentially of a first voltage in one direction of polarity for a first time interval, and a second voltage in the opposite direction of polarity for a second time interval, wherein the migration effected by the total first voltages and first time intervals over all cycles does not equal the migration effected by the second voltages and second time intervals over all cycles, thus resulting in a net differential migration of said substances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a gel electrophoresis method to effect differential net migration of electrically charged marcomolecular substances through a gel support in a single dimension, wherein the net migration for each of said substances is a function of the size of said substance,
the improvement which comprises subjecting substances selected from the group consisting of DNA, RNA, and detergent-protein complexes, which have been applied to an electrophoresis gel support, to the repeated inversion of an electrical field along a single dimension, wherein the repeated inversion comprises cycles each consisting essentially of a first voltage in one direction of polarity for a first time interval and a second voltage in the opposite direction of polarity for a second time interval.
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