Tandem Mass Spectrometry
Tandem Mass Spectrometry - Related Videos
07:09
Tandem Mass Spectrometry
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2023
In tandem mass spectrometry a biomolecule of interest is isolated from a biological sample, and then fragmented into multiple subunits in order to help elucidate its composition and sequence. This is accomplished by having mass spectrometers in series. The first spectrometer ionizes a sample and filter ions of a specific mass to charge ratio. Filtered ions are then fragmented and passed to a second mass spectrometer where the fragments are analyzed. This video introduces the principles of...
01:21
Tandem Mass Spectrometry
0 Views •
2025
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
07:25
Quantitative Metabolomics of Saccharomyces Cerevisiae Using Liquid Chromatography Coupled with Tandem Mass Spectrometry
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Cited by 4 •
2021
We present a protocol for the identification and quantitation of major classes of water-soluble metabolites in the yeast Saccharomyces cerevisiae. The described method is versatile, robust, and sensitive. It allows the separation of structural isomers and stereoisomeric forms of water-soluble metabolites from each other.
14:47
Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry
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Cited by 5 •
2016
MyoD is a myogenic transcription factor with a strong capacity to induce myogenic transdifferentiation of many fully differentiated non-muscle cell lines. The epigenetic mechanisms involved in this transdifferentiation are largely unknown. Here we describe a double-affinity purification method followed by mass spectrometry to exhaustively characterize MyoD partners.
01:33
Peptide Identification Using Tandem Mass Spectrometry
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2023
Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties. This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
FAQs
The first mass analyzer narrows the measurement to a selected precursor ion according to its mass-to-charge ratio. This reduces the contribution of other ions present in the biological sample before fragmentation occurs. The second analyzer then records product ions derived from that selected precursor, allowing the resulting pattern to be associated with a particular molecular structure or sequence.
Collision-induced fragmentation converts a selected precursor ion into smaller product ions. Rather than relying only on the precursor mass, the analysis examines the masses of these fragments and their combined pattern. That additional information creates a structural fingerprint, which is especially useful when researchers need to characterize peptides, proteins, or metabolites in complex biological samples.
Product-ion patterns provide multiple measurements derived from the same precursor molecule. Their combined mass information can support structural interpretation more strongly than a single mass value alone. In biological research, this pattern-based evidence helps connect measured ions with peptide sequences, protein identities, or metabolite profiles, depending on the analytical objective.
A typical experiment proceeds through three linked analytical stages: precursor-ion selection, collision-induced fragmentation, and product-ion measurement. The first analyzer selects an ion by mass-to-charge ratio, the selected ion is fragmented, and the second analyzer measures the resulting products. Researchers interpret these measurements as a structural fingerprint for the molecules in the sample.
Researchers may choose this approach when a biological sample contains many molecular components and both identification and measurement are needed. Supported applications include peptide sequencing, protein identification, metabolite profiling, and targeted quantification. The method is therefore relevant to studies that must distinguish molecular signals while examining complex biological material.
In biology, the technique can connect molecular measurements with cellular pathways, biomarkers, drug metabolism, and disease-associated changes. Peptide and protein analyses support characterization of biological components, while metabolite profiling examines changes in small-molecule patterns. Its sensitivity and molecular specificity make these applications useful for investigating complex molecular states and comparisons.