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Related Concept Videos

Mass Analyzers: Overview01:13

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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
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Extraction: Advanced Methods00:56

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
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Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
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MS Amanda 2.0: Advancements in the standalone implementation.

Viktoria Dorfer1, Marina Strobl1, Stephan Winkler1

  • 1Bioinformatics Research Group, University of Applied Sciences Upper Austria, Softwarepark 11, 4232 Hagenberg, Austria.

Rapid Communications in Mass Spectrometry : RCM
|March 24, 2021
PubMed
Summary

MS Amanda 2.0 enhances peptide identification in mass spectrometry with a faster, more flexible algorithm. This improved software maintains its core scoring accuracy while boosting performance and supporting new data types.

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Area of Science:

  • Proteomics
  • Computational Biology
  • Mass Spectrometry

Background:

  • Database search engines are crucial for peptide identification in mass spectrometry.
  • Software value depends on robust algorithms and continuous improvement.

Purpose of the Study:

  • To present MS Amanda 2.0, an updated version of the MS Amanda peptide identification algorithm.
  • To highlight improvements in speed, flexibility, and data handling.

Main Methods:

  • The original MS Amanda scoring algorithm for peptide spectrum match quality assessment was retained.
  • The software was re-implemented for enhanced performance and usability.

Main Results:

  • MS Amanda 2.0 offers a 3-5x speedup compared to previous versions.
  • The new version supports additional ion types and standard data formats.
  • Optimal performance is achieved using common ion types during searches.

Conclusions:

  • MS Amanda 2.0 represents a significant advancement in peptide identification software.
  • The software is freely available for research use.