Track topics on Twitter Track topics that are important to you
Allergen Glb33 is an important allergen in rice that can cause allergic reactions such as asthma and atopic dermatitis. However, knowledge of the content in rice is sparse. In the present work, an absolute protein quantification method was established for allergen Glb33 in rice samples using liquid chromatography-tandem mass spectrometry. After extraction of allergen Glb33 from rice grains using salt solution, the isotope-labelled peptide internal standard was added to the extract, followed by enzymatic digestion with trypsin. The signature peptide and its isotope-labelled analogue from the tryptic hydrolysates of allergen Glb33 and the internal standard were detected by liquid chromatography-tandem mass spectrometry. The quantitative bias caused by tryptic efficiency and matrix effect was corrected by using two isotope-labelled standard peptides. The method exhibited good linearity in the range of 1-200 nM, with coefficients of determination (R2) > 0.998. A high sensitivity was observed, with a limit of quantification of 0.97 nM. Mean recoveries obtained from different rice matrices ranged from 82.7%-98.1% with precision < 8.5% in intra-day trials (n = 6), while mean recoveries were from 75.1%-107.4% with precision < 14.6% in inter-day trials (n = 14). The developed method was successfully applied to the analysis of allergen Glb33 in 24 different rice cultivars.
This article was published in the following journal.
Name: Journal of agricultural and food chemistry
In this unit, we describe a high-throughput absolute quantification protocol for 16 protein-bound amino acids (PBAAs) that combines a microscale protein hydrolysis step and an absolute quantification ...
Development of a high performance liquid chromatography method with fluorescence detection for the routine quantification of tamoxifen, endoxifen, and 4-hydroxytamoxifen in plasma from breast cancer patients.
To date, several methods for quantification of tamoxifen and its metabolites have been developed, most of which employ liquid chromatography tandem-mass spectrometry (LC-MS/MS). These methods are high...
Tegoprazan is a novel potassium-competitive acid blocker (P-CAB) recently approved in Korea as a next-generation therapeutics for gastric acid-related diseases. In the present study, we demonstrate a ...
A method for the extraction and quantification of zoledronic acid (ZA) from human bone was set up and validated. This method allowed the quantification of ZA from jawbone sequestrations of patients af...
The quantification of eicosanoids and their metabolites in biological samples remain an analytical challenge, even though a number of methodologies/techniques have been developed. The major difficulti...
RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about the affect of body mass index on the way anticancer drugs work in the bod...
The background for performing the present study is to compare the mass calculations by CT scanning and by invasive absolute blood flow measurements and thereby corroborating both methods.
RATIONALE: Finding a better way to measure levels of sex hormones in the blood may help doctors monitor cancer in future patients. PURPOSE: This study is looking at different ways of meas...
RATIONALE: Studying samples of tumor tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cance...
The purpose of this study is to evaluate the basis for the reported good effects of antioxidant supplementation. A blood test using Mass Spectrometry will measure DNA damage which is expec...
A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection.
A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.
Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.
A method of separation of two or more substances by repeated distribution between two immiscible liquid phases that move past each other in opposite directions. It is a form of liquid-liquid chromatography. (Stedman, 25th ed)
Chromatographic techniques in which the mobile phase is a liquid.
Acne Dermatology Eczema Psoriasis Wound Care Dermatology is the medical specialty concerned with the diagnosis and treatment of skin disorders (Oxford Medical Dictionary). As well as studying how the skin works, dermatology covers...
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...