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In mass spectrometry, data-independent acquisition (DIA) is a method of molecular structure determination in which all ions within a selected m/z range are fragmented and analyzed in a second stage of tandem mass spectrometry. [1] [2] Tandem mass spectra are acquired either by fragmenting all ions that enter the mass spectrometer at a given ...
A quadrupole time-of-flight hybrid tandem mass spectrometer. Tandem mass spectrometry, also known as MS/MS or MS 2, is a technique in instrumental analysis where two or more stages of analysis using one or more mass analyzer are performed with an additional reaction step in between these analyses to increase their abilities to analyse chemical samples. [1]
Download as PDF; Printable version ... the first unknown peptide using soft ionization and tandem mass spectrometry ... and coauthored over 700 papers and book ...
In mass spectrometry, de novo peptide sequencing is the method in which a peptide amino acid sequence is determined from tandem mass spectrometry. Knowing the amino acid sequence of peptides from a protein digest is essential for studying the biological function of the protein. In the old days, this was accomplished by the Edman degradation ...
Modern tandem mass spectrometry (MS) instruments combine features of fast duty cycle, exquisite sensitivity, and unprecedented mass accuracy. Tandem mass spectrometry, which is an ideal match for the large-scale protein identification and quantification in complex biological systems.
A sector instrument can be combined with a collision quadrupole and quadrupole mass analyzer to form a hybrid instrument. [1] A BEqQ configuration with a magnetic sector (B), electric sector (E), collision quadrupole (q) and m/z selection quadrupole (Q) have been constructed [2] [3] and an instrument with two electric sectors (BEEQ) has been described.
Selected reaction monitoring (SRM), also called multiple reaction monitoring (MRM), is a method used in tandem mass spectrometry in which an ion of a particular mass is selected in the first stage of a tandem mass spectrometer and an ion product of a fragmentation reaction of the precursor ions is selected in the second mass spectrometer stage ...
Electron-capture dissociation (ECD) is a method of fragmenting gas-phase ions for structure elucidation of peptides and proteins in tandem mass spectrometry. It is one of the most widely used techniques for activation and dissociation of mass selected precursor ion in MS/MS.