MALDI-MS analysis of nucleic acids bound to a surface
First Claim
1. A method of analyzing a polynucleotide using matrix assisted laser desorption/ionization mass spectrometry, the method comprising a) obtaining the polynucleotide bound to a substrate via a linker moiety, the linker moiety comprising a triaryl methyl linker group wherein the polynucleotide is bound to a substrate via the triaryl methyl linker group;
- b) contacting the polynucleotide bound to the substrate with a matrix material; and
c) analyzing the polynucleotide by matrix assisted laser desorption/ionization mass spectrometry.
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Abstract
A method of analyzing a polynucleotide using matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) is described. The method includes obtaining the polynucleotide bound to a substrate via a linker moiety having a triaryl methyl linker group. The polynucleotide bound to the substrate is then contacted with a matrix material and analyzed by MALDI-MS. During the MALDI-MS analysis, laser radiation is directed at the matrix material, thereby exciting the matrix material and causing cleavage of the linker moiety. Ions generated as a result of this excitation and cleavage process are then analyzed to provide information about the polynucleotide.
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Citations
25 Claims
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1. A method of analyzing a polynucleotide using matrix assisted laser desorption/ionization mass spectrometry, the method comprising
a) obtaining the polynucleotide bound to a substrate via a linker moiety, the linker moiety comprising a triaryl methyl linker group wherein the polynucleotide is bound to a substrate via the triaryl methyl linker group; -
b) contacting the polynucleotide bound to the substrate with a matrix material; and
c) analyzing the polynucleotide by matrix assisted laser desorption/ionization mass spectrometry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of analyzing a polynucleotide using matrix assisted laser desorption/ionization mass spectrometry, the method comprising
a) obtaining a composition having the structure (I)
●- -Cgp-Trl-Cgp′
-Pnt (I)
wherein the groups are defined as follows;
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- is a substrate,Trl is a triaryl methyl linker group having three aryl groups, each bound to a central methyl carbon, at least one of said three aryl groups having one or more substituents, Cgp is a linking group linking the substrate and the triaryl methyl linker group, or is a bond linking the substrate and the triaryl methyl linker group, Pnt is a polynucleotide, and Cgp′
is a linking group linking the polynucleotide and the triaryl methyl linker group, or is a bond linking the polynucleotide and the triaryl methyl linker group.b) contacting the composition having the structure (I) with a matrix material; and
c) analyzing the polynucleotide by matrix assisted laser desorption/ionization mass spectrometry. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- -Cgp-Trl-Cgp′
Specification