Methods and compositions for enriching compositions for polymerase enzyme complexes
First Claim
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1. A method for enriching a loading composition for polymerase enzyme complexes, the method comprising:
- (a) providing a loading composition comprising free polymerases and polymerase enzyme complexes, wherein the polymerase enzyme complexes are in an inactive form, and wherein each polymerase enzyme complex comprises a polymerase enzyme bound to a nucleic acid template;
(b) applying a protease to the loading composition, which protease is more effective against the free polymerases than against polymerases in the polymerase enzyme complexes, and performing limited proteolytic digestion to reduce the amount of free polymerase relative to the amount of polymerase enzyme complex present in the composition, thereby enriching the loading composition for polymerase enzyme complexes; and
(c) distributing the loading composition onto a substrate to provide a loaded substrate.
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Abstract
The present invention provides methods, compositions, and systems for enriching compositions for polymerase enzyme complexes. In particular, the methods, compositions, and systems of the present invention remove free polymerases from the compositions using one or more purification steps, including protease treatment, thus enriching the compositions for polymerases complexed with a template nucleic acid.
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Citations
21 Claims
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1. A method for enriching a loading composition for polymerase enzyme complexes, the method comprising:
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(a) providing a loading composition comprising free polymerases and polymerase enzyme complexes, wherein the polymerase enzyme complexes are in an inactive form, and wherein each polymerase enzyme complex comprises a polymerase enzyme bound to a nucleic acid template; (b) applying a protease to the loading composition, which protease is more effective against the free polymerases than against polymerases in the polymerase enzyme complexes, and performing limited proteolytic digestion to reduce the amount of free polymerase relative to the amount of polymerase enzyme complex present in the composition, thereby enriching the loading composition for polymerase enzyme complexes; and (c) distributing the loading composition onto a substrate to provide a loaded substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for enriching a loading composition for enzyme complexes, the method comprising:
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(a) providing a loading composition comprising free enzymes and enzyme complexes, wherein the enzyme complexes are in an inactive form; (b) applying a protease to the loading composition, which protease is more effective against the free enzymes than against enzymes in the enzyme complexes, and performing limited proteolytic digestion to reduce the amount of free enzyme relative to the amount of enzyme complex present in the composition, thereby enriching the loading composition for enzyme complexes; and (c) distributing the loading composition onto a substrate to provide a loaded substrate. - View Dependent Claims (21)
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Specification