Fingerprint analysis for a plurality of oligonucleotides
View Patent ↗The invention provides a method for evaluating the accuracy of an oligonucleotide sample, specifically a sample containing a variety of oligonucleotides of potentially varying size and sequence. The method provides a fingerprint that can be used to evaluate the accuracy of a multi-oligonucleotide sample whether or not the sample contains differing oligonucleotides that have the same or about the same molecular weight.
1. A method to determine the presence or absence of a constituent oligonucleotide in a sample oligonucleotide mixture by correlating one or more measured mass peak values with one or more calculated mass peak values, the method comprising:
a) obtaining a calculated mass spectrum wherein the calculated mass spectrum is comprised of assigned mass peak values representing known masses of oligonucleotides in an oligonucleotide mixture containing the constituent oligonucleotide;
b) obtaining a measured mass spectrum of the sample oligonucleotide mixture, wherein said measured mass spectrum is comprised of one or more measured mass peak values;
c) comparing the measured mass spectrum with the calculated mass spectrum by correlating one or more measured mass peak values with one or more assigned mass peak values in the calculated mass spectrum to determine if the measured mass spectrum contains a corresponding mass peak value for the constituent oligonucleotide, and
d) determining the presence of the constituent oligonucleotide in the sample oligonucleotide mixture when the measured mass spectrum contains the corresponding mass peak value for the constituent oligonucleotide.
2. The method according to claim 1 wherein the calculated and measured mass spectra are a mass spectrometry trace.
3. The method according to claim 1 wherein the calculated and measured mass spectra are an electrospray ionization mass spectroscopy trace.
4. The method according to claim 1 wherein the calculated and measured mass spectra are a matrix assisted laser desorption ionization time-of-flight mass spectrometry.
5. The method according to claim 1 wherein the calculated and measured mass spectra are an Electrospray Ionization Quadrupole Ion Trap.
6. The method according to claim 1 wherein the calculated and measured mass spectra are a Matrix Assisted Laser Desorption Ionization Quadrupole Ion Trap.
7. The method according to claim 1 wherein the calculated and measured mass spectra are a Matrix Assisted Laser Desorption Ionization Quadrupole Time of Flight.
8. The method according to claim 1 wherein the calculated and measured mass spectra are an Electrospray Ionization Quadrupole Time of Flight.
9. The method of claim 1 wherein the calculated mass spectrum is provided by a processor, wherein said processor accepts a set of given molecular weights of the oligonucleotide mixture to provide a calculated mass spectrum.
10. A kit for an assay utilizing a standard set of oligonucleotides, said kit comprising:
a set of oligonucleotides containing a constituent oligonucleotide, wherein each oligonucleotide in the set has a known molecular weight; a calculated mass spectrum comprised of assigned mass peak values representing known masses of oligonucleotides in the set, and means for comparing the assigned mass peak values to one or more measured mass peak values in a measured mass spectrum of a sample oligonucleotide mixture in order to determine the presence or absence of the constituent oligonucleotide in the sample oligonucleotide mixture.