METHODS FOR THE SEPARATION OF BIOLOGICAL MOLECULES USING SULFOLANE
First Claim
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1. A method for the isolation of a biological molecule, said method comprising:
- applying a sample comprising at least one biological molecule to at least one mineral substrate in the presence of an appropriate mixture of salts and sulfolane, whereby said mineral substrate adsorbs at least one biological molecule.
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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.
30 Citations
30 Claims
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1. A method for the isolation of a biological molecule, said method comprising:
applying a sample comprising at least one biological molecule to at least one mineral substrate in the presence of an appropriate mixture of salts and sulfolane, whereby said mineral substrate adsorbs at least one biological molecule. - View Dependent Claims (2, 3)
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4. A method for the isolation of single-stranded nucleic acids, said method comprising:
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applying a sample comprising at least one single-stranded nucleic acid molecule to at least one first mineral substrate in the presence of an appropriate mixture of salts whereby said mineral substrate retains predominantly double-stranded nucleic acids and said applying results in a filtrate that is essentially devoid of double-stranded nucleic acids, and applying the filtrate to a second mineral substrate in the presence of an appropriate mixture of salts and sulfolane, whereby said second mineral substrate binds predominantly single-stranded nucleic acids; washing said second mineral substrate at least once with a low salt buffer comprising an organic solvent or a mixture of organic solvents; and eluting said single-stranded nucleic acids from said second mineral substrate. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. A method for the isolation of double-stranded nucleic acids, said method comprising:
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applying a sample comprising at least one double-stranded nucleic acid molecule to at least one mineral substrate in the presence of an appropriate mixture of salts and optionally sulfolane, whereby said mineral substrate binds at least one double-stranded nucleic acid molecule; contacting said mineral substrate with RNase; and eluting said double-stranded nucleic acid molecules from said mineral substrate. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A process for the separation of single-stranded nucleic acids from double-stranded nucleic acids by treatment of a biological source, said treatment comprising:
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a) applying to a first mineral support an aqueous sample comprising material of said source under conditions whereby said first mineral support adsorbs or binds only one of said single- or double-stranded nucleic acids followed by, optionally, washing said first mineral support; and b) applying to a second mineral support the other of said single- or double-stranded nucleic acids, which was not adsorbed or bound by said first mineral support, in an aqueous solution containing sulfolane. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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- 27. A composition comprising a combination of one or more salts and sulfolane, which allows at least one biological molecule to adsorb to a mineral substrate.
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30. A kit comprising at least one container holding a composition comprising a combination of at least one salt and sulfolane, which allows a biological molecule to adsorb to a mineral substrate.
Specification