Method for rapid purification of nucleic acids for subsequent analysis by mass spectrometry by solution capture
First Claim
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1. A method of purifying a solution comprising nucleic acids for mass spectrometry analysis comprising:
- mixing said solution comprising nucleic acids with one or more magnetic beads linked to at least one anion exchange functional group having a pKa of 9 or greater to yield a suspension of said one or more magnetic beads in said solution wherein said nucleic acids bind to said at least one anion exchange functional group linked to said one or more magnetic beads;
isolating said one or more magnetic beads from said solution by application of a magnetic field;
removing said solution from said one or more magnetic beads;
washing said one or more magnetic beads to remove one or more contaminants with one or more wash buffers while said nucleic acids are bound to said at least one anion exchange functional group linked to said one or more magnetic beads; and
eluting said nucleic acids from said at least one anion exchange functional group linked to said one or more magnetic beads with an elution buffer compatible with electrospray ionization mass spectrometry wherein said elution buffer does not comprise a metal cation salt.
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Abstract
The present invention provides a method for rapid solution capture purification of nucleic acids for subsequent analysis by electrospray mass spectrometry which is efficient and cost-effective relative to existing methods. The present invention also provides kits useful for practicing rapid solution capture of nucleic acids so that purified samples are in condition for analysis by electrospray mass spectrometry.
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Citations
24 Claims
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1. A method of purifying a solution comprising nucleic acids for mass spectrometry analysis comprising:
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mixing said solution comprising nucleic acids with one or more magnetic beads linked to at least one anion exchange functional group having a pKa of 9 or greater to yield a suspension of said one or more magnetic beads in said solution wherein said nucleic acids bind to said at least one anion exchange functional group linked to said one or more magnetic beads; isolating said one or more magnetic beads from said solution by application of a magnetic field; removing said solution from said one or more magnetic beads; washing said one or more magnetic beads to remove one or more contaminants with one or more wash buffers while said nucleic acids are bound to said at least one anion exchange functional group linked to said one or more magnetic beads; and eluting said nucleic acids from said at least one anion exchange functional group linked to said one or more magnetic beads with an elution buffer compatible with electrospray ionization mass spectrometry wherein said elution buffer does not comprise a metal cation salt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification