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Characterization of nucleic acid higher order structure by high-resolution tandem mass spectrometry.
Mass spectrometry (MS) is extensively used for the identification and sequencing of nucleic acids but has so far seen limited use for characterization of their higher order structures. Here, we have applied a range of different tandem mass spectrometry techniques, including electron detachment dissociation (EDD), infrared multiphoton dissociation (IRMPD), activated ion (AI) EDD, and EDD/IRMPD M...
The objective of the present prospective pharmacokinetic study was to describe the variability of plasma gentamicin concentrations in critically ill patients with acute kidney injury (AKI) necessitating extended daily diafiltration (EDD-f) using a population pharmacokinetic model and to subsequently perform Monte Carlo dosing simulations to determine which dose regimen achieves the pharmacodyna...
The structural characterization of glycosaminoglycans (GAG) oligosaccharides has been a long-standing challenge in the field of mass spectrometry. In this work, we present the application of electron detachment dissociation (EDD) Fourier transform mass spectrometry to the analysis of dermatan sulfate (DS) oligosaccharides up to 10 residues long. The EDD mass spectra of DS oligosaccharides were ...
Electron detachment dissociation (EDD) is an emerging mass spectrometry (MS) technique for the primary structure analysis of peptides, carbohydrates, and oligonucleotides. Herein, we explore the potential of EDD for sequencing of proteins of up to 147 amino acid residues by using top-down MS. Sequence coverage ranged from 72% for Melittin, which lacks carboxylic acid functionalities, to 19% for...
28 The objective of this prospective pharmacokinetic study was to describe the variability of 29 gentamicin plasma concentrations in critically ill patients with AKI necessitating extended30 daily-diafiltration (EDD-f) using a population pharmacokinetic model and to subsequently 31 perform Monte Carlo dosing simulations to determine which dose regimen achieves 32 pharmacodynamic targets most co...
UNLABELLED Intermittent hemodialysis (IHD) and continuous renal replacement therapies (CRRT) are used as Acute Kidney Injury (AKI) therapy and have certain advantages and disadvantages. Extended daily dialysis (EDD) has emerged as an alternative to CRRT in the management of hemodynamically unstable AKI patients, mainly in developed countries. OBJECTIVES We hypothesized that EDD is a safe opti...
The first application of electron detachment dissociation (EDD) to carbohydrates is presented. The structural characterization of glycosaminoglycan (GAG) oligosaccharides by mass spectrometry is a longstanding problem because of the lability of these acidic, polysulfated carbohydrates. Doubly-charged negative ions of four GAG tetrasaccharides are examined by EDD, collisionally activated dissoci...
Human papillomavirus (HPV) E6 oncoproteins target many cellular proteins for ubiquitin-mediated proteasomal degradation. In the case of p53, this is mediated principally by the E6AP ubiquitin ligase. Several studies have reported that E6 can target certain of its substrates in an apparently E6AP-independent fashion and that several of these substrates vary in the degree to which they are degrad...
Eosinophilic digestive disease (EDD) includes a broad spectrum of clinical presentations due to eosinophilic inflammation involving anywhere from the esophagus to the rectum. The heterogeneity in the clinical presentations of EDD is determined by the site and depth of eosinophilic infiltration. The sites of inflammation determine the nomenclature for EDD. The most well characterized of these, e...
We present an analysis of historical multi-wavelength emission the Changing Look (CL) Active Galactic Nucleus (AGN) in NGC 2992, covering epochs ranging from 1978 to 2021, as well new X-ray and optical spectra. The galaxy presents multiple Seyfert type transitions 2 intermediate-type, losing regaining its H$\alpha$ BEL recurrently. In X-rays, source shows intrinsic variability with absorption c...
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