Systems and methods for identifying compounds from MS/MS data without precursor ion information
US10141169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2013 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Oct 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided for identifying a precursor ion without using any a priori precursor ion information. In one method, a sample is analyzed using a tandem mass spectrometer, producing at least one measured product ion spectrum from a precursor mass-to-charge ratio range. The at least one measured product ion spectrum are received. A subset of measured product ions is selected from the at least one measured product ion spectrum. A list of candidate compounds is created by searching a dictionary of potential compounds that includes one or more predicted product ions for each of the potential compounds using the subset of measured product ions. A candidate compound on the list is selected as the identified compound. In another method, the measured product ions are assumed to correspond to shortened forms of the peptide and a protein database is searched for shortened forms of the peptide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.