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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]
RAId was developed at the National Center for Biotechnology Information, Robust Accurate Identification (RAId) [19] is a suite of proteomics tools for statistical analysis of tandem mass spectrometry data. [20] SEQUEST: Proprietary: SEQUEST is a MS data analysis program used for protein identification.
Sequest (often stylized as SEQUEST) is a tandem mass spectrometry data analysis program used for protein identification. [1] Sequest identifies collections of tandem mass spectra to peptide sequences that have been generated from databases of protein sequences.
The tandem mass spectrometry data on over 930,000 molecular standards (as of January 2024) [33] [36] is provided to facilitate the identification of chemical entities from tandem mass spectrometry experiments. [37] In addition to the identification of known molecules it is also useful for identifying unknowns using its similarity searching ...
Targeted mass spectrometry is a mass spectrometry technique that uses multiple stages of tandem mass spectrometry (MS n with n=2 or 3) for ions of specific mass , at specific time. [1] The values of the m/z and time are defined in an inclusion list which is derived from a previous analysis.
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 ...
If one of the labeled samples is more abundant, however, it may increase the sensitivity of the analysis for all samples. [10] Such isobarically labeled samples are referred to as isobaric carriers. They were introduced for single-cell protein analysis by mass spectrometry, [11] and have found many other applications. [12]
Today, analysis by a tandem mass spectrometer is a more common method to solve the sequencing of peptides. Generally, there are two approaches: database search and de novo sequencing. Database search is a simple version as the mass spectra data of the unknown peptide is submitted and run to find a match with a known peptide sequence, the ...
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