A Comparison of the Methods of Medium Resolution Selected Ion Recording and Multiple Reaction Monitoring When Applied to the Analysis of Steranes and Triterpenes in Crude Oil Extracts

2008 ◽  
pp. 59-59-25 ◽  
Author(s):  
GE Harriman ◽  
R Owen ◽  
VC Parr ◽  
O Weir ◽  
D Wood
Keyword(s):  
Crude Oil ◽  
Multiple Reaction Monitoring ◽  
Reaction Monitoring ◽  
Medium Resolution

Quantification and Confirmation of Zearalenone Using a LC-MS/MS QTRAP System in Multiple Reaction Monitoring and Enhanced Product Ion Scan Modes

2021 ◽  
Author(s):  
Shencong Lv ◽  
Xiaoqiong Wu ◽  
Jian Guan ◽  
Yong Yan ◽  
Miaohua Ge ◽  
...  
Keyword(s):  
Multiple Reaction Monitoring ◽  
Reaction Monitoring ◽  
Scan Modes

scholarly journals PSV-25 Detection of heart and aorta tissue peptide markers by the multiple-reaction monitoring method

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 362-363
Author(s):  
Daniil Khvostov ◽  
Natalya Vostrikova ◽  
Irina M Chernukha
Keyword(s):  
Amino Acid ◽  
High Performance ◽  
Multiple Reaction Monitoring ◽  
Meat Product ◽  
Meat Products ◽  
Amino Acid Sequences ◽  
Composition Analysis ◽  
Reaction Monitoring ◽  
Russian Science ◽  
Monitoring Method

Abstract Functional, particularly personalized meat-based foods are of more in demand by a consumer today. Functional additives, such as plant components and animal proteins from bovine or porcine tissues have been successfully used. With many ingredients added to foods, it is important to provide quality and composition monitoring to confirm the products’ authenticity, to identify undeclared or rarely used types of raw meat in product formulations. For example, if animal heart tissue is a component of a product formulation or if aorta tissue presents in a product due to improper trimming. Different methods are used to identify raw materials, including new approaches in proteomics and peptidomics that are considered the most effective modern methods nowadays. The purpose of the study is meat product composition analysis and special biomarker peptide identification to confirm the presence of heart and aorta tissue in a finished meat product. Over 20 amino acid sequences were checked based on earlier obtained data. Those amino acid sequences were analyzed with a high-performance liquid chromatography with mass spectrometric detection as described. The MS settings were selected using the Skyline. Signal-to-Noise ratio (S/N) over 10 units were used to choose the best peptide candidates. Seven peptides were found in porcine hearts. The best candidate was peptide VNVDEVGGEALGR (S/N - 73.10±5.3) from β-Hemoglobin. Two marker peptides from serum albumin were selected for pork aorta: TVLGNFAAFVQK (S/N 53.51±2.4) and EVTEFAK (S/N 31.69±4.1). These biomarkers showed the best detection and specificity. The multiply reaction monitoring method made it possible to identify the most/best specific peptides—biomarkers that could confirm the heart and/or aorta in meat products. The method can be used for comparative research or identification of best peptides that are specific to any type of animal tissue. The work was supported by the Russian Science Foundation, project no. 16-16- 10073.

scholarly journals Calcineurin Activity Assay Measurement by Liquid Chromatography–Tandem Mass Spectrometry in the Multiple Reaction Monitoring Mode

2014 ◽  
Vol 60 (2) ◽  
pp. 353-360 ◽  
Author(s):  
Lynn Carr ◽  
Anne-Laure Gagez ◽  
Marie Essig ◽  
François-Ludovic Sauvage ◽  
Pierre Marquet ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Mononuclear Cells ◽  
Multiple Reaction Monitoring ◽  
Internal Standard ◽  
Reaction Monitoring ◽  
Activity Assay ◽  
Peripheral Blood Mononuclear ◽  
Blood Concentrations ◽  
Transplant Patients

Abstract BACKGROUND Blood concentrations of the calcineurin inhibitors (CNIs) cyclosporine and tacrolimus are currently measured to monitor immunosuppression in transplant patients. The measurement of calcineurin (CN) phosphatase activity has been proposed as a complementary pharmacodynamic approach. However, determining CN activity with current methods is not practical. We developed a new method amenable to routine use. METHODS Using liquid chromatography–multiple reaction monitoring mass spectrometry (LC-MRM-MS), we quantified CN activity by measuring the dephosphorylation of a synthetic phosphopeptide substrate. A stable isotope analog of the product peptide served as internal standard, and a novel inhibitor cocktail minimized dephosphorylation by other major serine/threonine phosphatases. The assay was used to determine CN activity in peripheral blood mononuclear cells (PBMCs) isolated from 20 CNI-treated kidney transplant patients and 9 healthy volunteers. RESULTS Linearity was observed from 0.16 to 2.5 μmol/L of product peptide, with accuracy in the 15% tolerance range. Intraassay and interassay recoveries were 100.6 (9.6) and 100 (7.5), respectively. Michaelis–Menten kinetics for purified CN were Km = 10.7 (1.6) μmol/L, Vmax = 2.8 (0.3) μmol/min · mg, and for Jurkat lysate, Km = 182.2 (118.0) μmol/L, Vmax = 0.013 (0.006) μmol/min · mg. PBMC CN activity was successfully measured in a single tube with an inhibitor cocktail. CONCLUSIONS Because LC-MRM-MS is commonly used in routine clinical dosage of drugs, this CN activity assay could be applied, with parallel blood drug concentration monitoring, to a large panel of patients to reevaluate the validity of PBMC CN activity monitoring.

scholarly journals Comparison of Protein Immunoprecipitation-Multiple Reaction Monitoring with ELISA for Assay of Biomarker Candidates in Plasma

2013 ◽  
Vol 12 (12) ◽  
pp. 5996-6003 ◽  
Author(s):  
De Lin ◽  
William E. Alborn ◽  
Robbert J. C. Slebos ◽  
Daniel C. Liebler
Keyword(s):  
Multiple Reaction Monitoring ◽  
Reaction Monitoring

Biomarker Development for Intraductal Papillary Mucinous Neoplasms Using Multiple Reaction Monitoring Mass Spectrometry

2015 ◽  
Vol 15 (1) ◽  
pp. 100-113 ◽  
Author(s):  
Yikwon Kim ◽  
MeeJoo Kang ◽  
Dohyun Han ◽  
Hyunsoo Kim ◽  
KyoungBun Lee ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Multiple Reaction Monitoring ◽  
Reaction Monitoring ◽  
Intraductal Papillary Mucinous Neoplasms ◽  
Mucinous Neoplasms

A novel LC-MS/MS method for complete composition analysis of polysaccharides by aldononitrile acetate and multiple reaction monitoring

2021 ◽  
pp. 118478
Author(s):  
Ye Li ◽  
Jun Liang ◽  
Jia-Ning Gao ◽  
Yu Shen ◽  
Hai-Xue Kuang ◽  
...  
Keyword(s):  
Multiple Reaction Monitoring ◽  
Composition Analysis ◽  
Reaction Monitoring

Derivatization strategy for semi-quantitative analysis of medium- and long-chain fatty acids using multiple reaction monitoring

Talanta ◽  
2021 ◽  
pp. 122464
Author(s):  
Juntong Wei ◽  
Xiaojun Xiao ◽  
Kun Li ◽  
Yuanyuan Song ◽  
Shau-Ku Huang ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Quantitative Analysis ◽  
Multiple Reaction Monitoring ◽  
Reaction Monitoring ◽  
Long Chain Fatty Acids ◽  
Long Chain ◽  
Chain Fatty Acids
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