Methods for the separation of biological molecules using sulfolane
First Claim
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1. A method for the separation of a nucleic acid from other biological molecules present in a sample, said method comprising:
- applying an aqueous sample comprising at least one nucleic acid and at least one other biological molecule to at least one mineral substrate in the presence of one or more salts and sulfolane, wherein the concentration of the sulfolane is 15% to 80% by volume, and wherein the mineral substrate adsorbs at least one nucleic acid to create a mineral substrate-nucleic acid complex and a composition not adsorbed to the mineral substrate; and
removing at least a portion of the composition not adsorbed to the mineral substrate, thereby separating the nucleic acid from at least one other biological molecule present in the sample.
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Abstract
The present invention provides a method for the isolation of biological molecules by the adsorption of the molecules onto a mineral substrate in the presence of an appropriate mixture of salts and sufolane. Preferably, the biological molecules are nucleic acids. Compositions and kits for performing the process according to the invention are also provided.
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Citations
22 Claims
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1. A method for the separation of a nucleic acid from other biological molecules present in a sample, said method comprising:
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applying an aqueous sample comprising at least one nucleic acid and at least one other biological molecule to at least one mineral substrate in the presence of one or more salts and sulfolane, wherein the concentration of the sulfolane is 15% to 80% by volume, and wherein the mineral substrate adsorbs at least one nucleic acid to create a mineral substrate-nucleic acid complex and a composition not adsorbed to the mineral substrate; and removing at least a portion of the composition not adsorbed to the mineral substrate, thereby separating the nucleic acid from at least one other biological molecule present in the sample. - View Dependent Claims (2, 3, 4, 5)
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6. A method for the separation of DNA from RNA in a sample, said method comprising:
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applying an aqueous sample comprising DNA and RNA to a first mineral substrate in the presence of one or more salts and in the absence of sulfolane, wherein the first mineral substrate retains predominantly the DNA and wherein the action of applying the aqueous sample results in a filtrate that is essentially devoid of the DNA, and applying the filtrate to a second mineral substrate in the presence of one or more salts and sulfolane, wherein the concentration of the sulfolane is about 15% to 50% by volume, and wherein the action of applying the filtrate to the second mineral substrate results in binding of predominantly RNA, thereby separating DNA in the sample from RNA in the sample. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method for the separation of RNA from other biological molecules present in a sample, said method comprising:
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applying a sample comprising RNA and at least one other biological molecule to at least one mineral substrate in the presence of one or more salts and sulfolane, wherein the sulfolane concentration is 15% to 80% by volume, and wherein the mineral substrate binds the RNA; and removing at least a portion of the sample not adsorbed to the mineral substrate, thereby separating the RNA from at least one other biological molecule present in the sample. - View Dependent Claims (15, 16)
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17. A composition comprising:
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a mineral substrate; and an aqueous composition comprising one or more salts and sulfolane, wherein the sulfolane concentration is 15% to 80% by volume. - View Dependent Claims (18, 19)
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20. A kit comprising:
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at least one mineral substrate; and at least one container holding an aqueous composition comprising one or more salts and sulfolane, wherein the sulfolane concentration is 15% to 80% by volume. - View Dependent Claims (21, 22)
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Specification