Stacked-Electrode Peptide-Fragmentation Device
First Claim
Patent Images
1. A method of protein analysis, comprising:
- providing a fragmentation device comprising stacked electrodes that each define an aperture, the apertures defining an ion-manipulation region and an axial direction of the fragmentation device;
confining positive peptide ions in a first DC potential well in the ion-manipulation region;
confining negatively charged particles in a second DC potential well in the ion-manipulation region;
reducing a DC barrier between the first and second DC potential wells to mix the positive peptide ions and the negatively charged particles, in the ion-manipulation region, to fragment at least some of the positive peptide ions; and
mass analyzing at least some of the peptide ion fragments.
1 Assignment
0 Petitions
Accused Products
Abstract
A chemical processing apparatus includes a fragmentation device that includes a linear set of stacked electrodes and a voltage control module that forms DC potential wells of opposite polarity for mutual confinement of opposite polarity ions. A method of protein analysis includes confining positive peptide ions and negatively charged reagent anions in, respectively, first and second DC potential wells in a fragmentation device, mixing the ions, in the fragmentation device, and analyzing ion fragments formed in the mixture.
-
Citations
17 Claims
-
1. A method of protein analysis, comprising:
-
providing a fragmentation device comprising stacked electrodes that each define an aperture, the apertures defining an ion-manipulation region and an axial direction of the fragmentation device; confining positive peptide ions in a first DC potential well in the ion-manipulation region; confining negatively charged particles in a second DC potential well in the ion-manipulation region; reducing a DC barrier between the first and second DC potential wells to mix the positive peptide ions and the negatively charged particles, in the ion-manipulation region, to fragment at least some of the positive peptide ions; and mass analyzing at least some of the peptide ion fragments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A chemical processing apparatus, comprising:
-
a fragmentation device, comprising a plurality of electrodes disposed in series along a longitudinal axis of the fragmentation device and defining an ion-manipulation region; means for applying at least a first DC voltage to at least two contiguous electrodes of the plurality of electrodes to define a first DC potential well, and applying at least a second DC voltage to at least two different contiguous electrodes of the plurality of electrodes to define a second DC potential well; means for reducing a DC potential barrier between the first and second DC potential wells to permit positive peptide ions, confined in the first DC potential well, and negatively charged particles, confined in the second DC potential well, to mix; and a mass-spectrometry module for analyzing at least some fragments of the positive peptide ions extracted from the mixture. - View Dependent Claims (14, 15, 16, 17)
-
Specification