T7 DNA polymerase
First Claim
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1. A method for production of a composition consisting essentially of a T7-type DNA polymerase and thioredoxin, comprising the steps of:
- culturing a cell comprising plasmid DNA encoding a T7-type DNA polymerase to express said T7-type DNA polymerase from said plasmid DNA, andpurifying said T7-type DNA polymerase expressed from said cell to reduce the exonuclease activity associated with said T7-type DNA polymerase to a level below that of exonuclease activity associated with a corresponding naturally-occurring T7-type DNA polymerase.
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Abstract
1Method for production of a composition consisting essentially of a T7-type DNA polymerase and thioredoxin. The method includes culturing a cell containing plasmid DNA encoding a T7-type DNA polymerase to express the T7-type DNA polymerase from the plasmid DNA, and purifying the T7-type DNA polymerase expressed from the cell to reduce the exonuclease activity associated with the T7-type DNA polymerase compared to the level of exonuclease activity associated with a corresponding naturally-occurring T7-type DNA polymerase.
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Citations
18 Claims
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1. A method for production of a composition consisting essentially of a T7-type DNA polymerase and thioredoxin, comprising the steps of:
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culturing a cell comprising plasmid DNA encoding a T7-type DNA polymerase to express said T7-type DNA polymerase from said plasmid DNA, and purifying said T7-type DNA polymerase expressed from said cell to reduce the exonuclease activity associated with said T7-type DNA polymerase to a level below that of exonuclease activity associated with a corresponding naturally-occurring T7-type DNA polymerase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for production of a composition comprising purified T7-type DNA polymerase at a concentration suitable for use in DNA sequencing, comprising the steps of:
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providing a T7-type DNA polymerase and thioredoxin together having sufficient DNA polymerase activity for use in DNA sequencing, wherein said T7-type DNA polymerase is expressed from cloned DNA, and treating said T7-type DNA polymerase to reduce the exonuclease activity associated with said T7-type DNA polymerase to a level below that of exonuclease activity associated with a corresponding naturally occurring T7-type DNA polymerase. - View Dependent Claims (18)
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17. A method for production of a composition comprising purified T7-type DNA polymerase at a concentration suitable for use in DNA sequencing, comprising the steps of:
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providing a T7-type DNA polymerase having sufficient DNA polymerase activity for use in DNA sequencing, wherein said T7-type DNA polymerase is expressed from cloned DNA, and treating said T7-type DNA polymerase to reduce the exonuclease activity associated with said T7-type DNA polymerase to a level below that of exonuclease activity associated with a corresponding naturally occurring T7-type DNA polymerase.
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Specification